As a science teacher, this is the best project I do all year.  I have yet to come across a project where students are more engaged.  They want to come after school to work on it, they ask to take the project home to work over the weekend, students are shocked when the class period has come to an end, and they all want to skip their next class to continue working.

The purpose of this project is to reinforce Newton's Laws of Motion through roller coaster physics.  The objective is to have a marble take the GREATEST amount of time to get from the top of the first hill to where the coaster ends. 

This instructable has also been submitted into the paper contest.  I know the competition is fierce so please vote for me!

Students will demonstrate ability to:

Plan and Create a paper roller coaster 
Evaluate and test and retest their roller coaster
Analyze how to best manipulate the forces of friction and gravity
Explain the difference between potential energy and kinetic energy
Calculate problems involving free fall
Create tracks to better understand centripetal force

This assignment can be easily differentiated... make the goal time longer, make the base smaller, limit the amount of paper or tape...

Below is a roller coaster I created as an example for my students.  The video starts with an explanation followed by a test run (around the 1:50 mark).  I tried to incorporate as many features as possible onto one sheet of card stock.  The last step has a video of a paper roller coaster I created a few years ago that includes an elevator.

Step 1: Materials, Helpful Hints and Rubric

Here's what you're gonna need!

Card Stock Paper (110 # is best)
Tape (lot's of it)
A paper cutter
Masking tape or Duct tape (you don't need the tape, just the shape of the roll for your loops and corkscrews).

Helpful Hints in no particular order.

Build from the bottom up.
Crease ALL folds.
Make a plan, but be flexible if things aren't working out.
Make good supports.
Keep the decline of your tracks to a minimum (so the marble doesn't roll too fast) unless you are trying to get over a loop or complete a jump.


Paper Roller Coasters
Objective: Work in groups of 2 or 3 utilizing your knowledge of Newton’s 3 Laws of Motion to create a paper roller coaster that can carry a marble for the longest period of time without stopping.

1. The model should be designed for a glass marble. When released from the top of the first hill, the marble will travel through the entire ride and arrive at the bottom loading platform. (For this project, the marble will be raised by hand to the top of the first hill to start the “ride”.)
2. Your team may use more than one marble.
3. Magnets, electricity, springs, and other forms of energy may not be used ­ this is a “gravity ride” only.
4. No one is permitted to touch the coaster once the ride begins.
5. There needs to be a clear “end” to your ride.
6. You will have only three chances. Your longest time will be the one you get graded on.

Step 2: Supports

Supports truly are one of the most important parts of the paper roller coaster.  All folds NEED to be creased.  The supports are the skeleton of your roller coaster and we don't want them bending or sagging.  The difference between a good coaster and a not so good coaster is the supports.

Watch the VIDEO to see how to build them or print out the PDF called "Coaster Element Instructions" in the first step.   

Step 3: Tracks

There are a few ways to create tracks.  There is no wrong way to do this as long as the marble doesn't get stuck.  It's a good idea to experiment a few different types because you may use more than one kind on the same roller coaster.  There are also a number different methods for creating turns in your tracks.  Either check out the PDF from step one or check out VIDEO 1 here and VIDEO 2 here.  You can also watch the video of my completed coaster to see a few different ways to make tracks.

Step 4: Loops and Corkscrews

Start out by making two straight tracks with good creases.  

Tape the two tracks together at the ends with about 2 cm overlap.

Cut both walls, down the entire length of the combined tracks, from the top of the wall to the CREASE.  Each cut should be about 1 cm apart.  If you don't cut all the way to the crease, it will not work.

Wrap the tracks around a roll of masking tape to get the desired shape.  

Watch the video for the rest.

The following passage comes from Kids Britannica.  The site has a terrific history of Roller Coasters.

"The end of the 19th century, the roller coaster industry was turned upside down. Literally. Flip-Flap Somersaulting loop track rides were first attempted in Paris in the middle of the century. The rides were based on a popular child's toy that exploited centrifugal force to keep a small ball rolling on a looped track without falling off. But passengers found the inversions uncomfortable and dangerous, and looping coasters were not seen again until 1895, when Lina Beecher installed the Flip-Flap Railway at Paul Boyton's Sea Lion Park in Coney Island. Though uncomfortable and dangerous still, the 25-foot circular loop proved popular, whipping the passengers (especially their necks) into a frenzy, before closing after only a few years.

Loop-the-LoopIn an attempt to reduce the high g-forces of the vertical loop, Edward Prescott Coney Island aerial built the 1901 Loop-the-Loop at Coney Island, with a softer, oval-shaped design. It was better crafted than Flip-Flap, but it would still be another 75 years before a successful vertical loop was realized. Although hampered by a low seating capacity that eventually ran it aground, Loop-the-Loop was the hot ticket for coaster enthusiasts for the next six years, until the advent of the first high-speed coaster, Drop-the-Dip (later called Rough Riders). These increased levels of danger brought improvements in safety, such as the introduction of lap bars, which kept passengers from becoming projectiles."

Step 5: Time Wasters: Toilet Bowl and Funnel / Half Pipe Hybrid

To create a funnel or "toilet bowl" you want to start with a full sheet of card stock.  
First: Draw the largest circle possible on the sheet.  
Second: Cut out the circle.  
Third: Decide where the center of the paper circle is located and cut a straight line from the edge of the circle to the point in the middle.
Fourth: Cut a hole just larger than the marble, around the point you located in the middle.  
Finally: Overlap the edges of the straight cut to create the funnel and tape into place.  The distance you overlap the edges will determine the steepness in the sides of your funnel.  

It is important that your funnel be very stable.  If your funnel wobbles, the marble will head straight down the hole and you won't end up with an effective time waster.

There are a few other ways to create time wasters.  Watch the video below for a few suggestions with instructions.  Just be creative!

To create the Funnel / Half Pipe Hybrid, you need to start with a full sheet of card stock.
First: Cut a straight line from the one corner towards the opposite corner, but only make the cut a few inches deep.
Second: Cut a hole just larger than the marble at the end of the straight cut. 
Third: Overlap the edges of the straight cut.
Finally: Tape the overlapped edges in place.


Step 6: Half Pipe

A half pipe build is a multi-step process.  No matter what, the half pipe needs to be secure.  The video can show the procedure more clearly than I can describe.  

Step 7: Paper Elevator and Use of Multiple Marbles.

It took me a few hours to get the elevator to work.  It was a very frustrating process, but it was pretty cool to see it work.  There is no optical illusion.  The video below starts with a steep drop, goes through a double loop, and straight into an elevator car.  The elevator car has a catch and release mechanism.  The elevator car is released when the momentum of the marble is transferred to the back of the car.  The elevator uses a counter weight on the far side of the elevator shaft (not visible in video) to carry the original marble back up.  The marble races though corkscrews, around turns, and over a bump on it's way to the finish.  Although this coaster doesn't take long to finish, it has features that are pretty cool considering it's all paper, tape, marbles, and a little string.  (the counterweight on the other side was made up of 4 marbles taped together).  I tried to make it work without the string, but the tape created too much friction.  I don't have step by step instructions on how to build an elevator.  I'm sure there are a number of different ways it can be accomplished.  The experimentation process is where most of the learning takes place!

An easier way to extend the duration of the paper coaster is to incorporate multiple marbles.  According to my rubric, once the first marble is released, the team may not touch the coaster.  In order to have a second marble travel the length of the coaster without student intervention, they must create a release system.  When the first marble finishes its run, it crashes into something... that pulls on a string... that releases another marble at the top of the coaster.  The second marble can either run down the same tracks as the first or you could have a completely separate set of tracks.  

I hope you have a chance to build one of your own.  If you do, be sure to send me some pictures and add any advice you have to the comments.  Thanks for looking!
<p>Did you do one pack of card stock per group? I'm loving this as an idea for my Physics classes...</p>
<p>I teach physical science and my students started this project today. It is the first time I've tried it. I am giving each group 35 sheets of cardstock. I told them this is their &quot;budget&quot;. If they need more they will have to buy their own. I am not sure how far 35 sheets will go; I'm on a budget myself.</p>
<p>Thank you so much!</p>
<p>You're very welcome</p>
I know card stock can be pretty expensive (especially the 110#). I used a big paper cutter and cut the sheets into thirds for them. 100 sheets sounds about right. I like the idea of putting them on a budget. Let me know how it goes and please send me any questions. Good luck!!
I cut the card stock into thirds so I only used about 3 reams for around 60 students. I had plenty of paper left over for whole sheets to be made into funnels and time wasters too. The hardest part is tape. The kids fly through it. When I was teaching in a public school I asked the kids to bring in rolls of tape from home. The way I set up the videos makes it really easy to flip the class. Have them watch for homework so they know what to do when class starts. The best thing for them to build on is foam core poster board, but cardboard works well too. The projects take up a fair amount of room so I need my students to move them from the lab tables to the floor at the end of class. The base needs to be firm so they can move them. Finally, to keep the room from becoming a total disaster, I tell the students that anything that falls off of their base is fair game. Other teams can take tracks, corkscrews, time wasters, supports... If they are on the floor. They're just not allowed to steal something off the base from another team and say they found it. There are so many variations to the project. Good luck and have fun. Let me know if I can help in any way.
<p>Just awesome</p>
Thank you very much!
<p>You're very welcome</p>
<p>You're welcome</p>
This is sweet
<p>You're welcome</p>
<p>I am a student at Monroe Elementary. My name is Journey Baham and I am in 7 grade. I don't understand what you mean by we just need the shape of the for the loops and corkscrews. Can't we just use paper?</p>
<p>In my class we are building a roller coaster using nothing but toilet paper and napkin rolls. Your tips really helped! </p>
Wow! That sounds like a monumental challenge. I love the idea.
<p>Biodynamic- Can you share the width of which you cut the supports, tracks and corkscrews into? I cut the cardstock into thirds which is what another commenter had suggested but it seems to small? </p><p><br>Thank you?</p>
Cut the paper lengthwise into thirds. I use a large paper cutter and made marks on the ruler to speed things up. I'll try to remember to take a picture for you. The slips end up being about 3 and 2/3&quot; x 11&quot;. Good luck and let me know how it goes!<br>
<p>I cut into thirds from 8.5 not 11.. maybe I did it wrong? </p>
<p>I cut into thirds from 8.5 not 11.. maybe I did it wrong? </p>
<p>I was reading the pdf with the rubric, I see you give extra bonus (2 seconds) for every &quot;theme&quot;. What do you mean with a &quot;theme&quot; exactly?</p>
Great question. I added the &quot;theme&quot; idea after the first or second year of doing the roller coaster project because I needed something for the teams who were &quot;finished&quot; to work on. In the past, students have added print outs or hand drawings of everything from cartoon characters like Phineas and Ferb to sports stars with a basketball theme to movie themes like the Wizard of Oz. Each theme tied directly into the coaster. For example, the team that built the Oz coaster had a series of corkscrews attached together that looked like a big twister in the middle of their project and the basketball team had a jump that launched their marble into a paper hoop. Students have had so much fun decorating and finding creative ways to develop their theme that I thought it was a good idea to include it for bonus points. It's also been good for the students who might not have the fine motor skills to fold the paper for tracks and supports. They can still contribute to the team in a meaningful way. Hope this helps. I'd love to see how they turn out. <br>
<p>Great idea to foster creativity, thank you!</p>
Your website is such a treasure! I'm a beginning teacher and next year I will be teaching my first middle school physics class. I'm planning to make the roller coaster a big exciting project we do throughout the year . Thank you so much for sharing this!
Thank you! The time frame really depends on how long your class periods are. This past year I was working with 50 minute class periods. It took students about a 6-7 class days to finish. Some groups would have happily continued to work for as long as I let them. For the groups who finish early, I encourage them to try to make the &quot;longest&quot; coaster in the class/grade. They also have their theme that they can work on. <br>I usually give them a 20*30 sheet of foam core and tell them all supports must be attached to the board. Tracks can extend out over the &quot;base&quot; but must ultimately come back because there are no supports to attach tracks. <br>Often times, students will have an idea in their head and will work for the first few days and get stuck. I always encourage them to salvage the best supports and start over. Even if there are only two or three days left, it's better for them to learn from their mistakes, have a few good models to look at (other class coasters), have had some practice making tracks and supports, and then rebuild. <br>On the first day, I always have them show me they know how to make supports and tracks. We have a contest to see who can make the best. I walk around the room and inspect each one. If they are bad... I tell the kids what they need to do differently (usually need better creases or straighter fold lines). I make a model of what a good support should look like and the winner gets the one I made. Next, we do the same thing with tracks. You can always tell who watched the videos from the night before! <br>I know this was a lot of info. I hope it helps. Let me know how it goes and don't hesitate to send questions. Good luck!
<p>sup bro what your name</p>
Thanks. Let me know if you decide to build one.
A couple of questions - what is the time frame for this project and are there size limits for the roller coasters? Thanks for all your hard work!
A couple of questions - what is the time frame for this project and are there size limits for the roller coasters? Thanks for all your hard work!
<p>how did you do that</p>
I spent a few moons learning from Tibetan paper folding masters to become proficient in the art of marble roller coasters. I also have practice, patience, and get paid to work with 7th graders. Thanks for looking!
Physics is cool. A tremendous project to explain physics. Keep up the educational aim.
<p>Hi! Very Nice! Helping my grandson and we've watched your videos several times and found them very helpful, but after a vast search we could find nothing for the elevator. Do you have any information on how to construct a catch and release mechanism or where to look? Thank you</p>
I'm sorry, but I don't have a step by step for building an elevator... Yet. The one I built was created a few years ago and took so much time and effort, looking back I wish I had been more diligent about documenting the step by step. The best advice I can give you is to keep trying. Hopefully you'll be able to show me a better way to do it! I'll try to recreate the elevator this winter when my students are back to building their coasters. Good luck!
<p>Thanks for the reply, we'll keep working at it. It's a science fair project so we have a couple of months to put it together. Our search now is for some type of release mechinsim. I'll keep you posted if we sucessed and looking forward to you next project.</p>
<p>This is perfect for my Physics 30 class! </p><p>And Voted</p>
love these things

About This Instructable




Bio: I'm a middle school science teacher going on 15 years in the classroom. I've taught 6th, 7th, and 8th graders. I'm constantly ... More »
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