Instructables
Picture of How to Build a Marble Roller Coaster
Marble roller coasters are fun and easy to build. This project has a few things that help this work. One of them is one of Newton's Laws of Motion that says that an object in motion will stay in motion and an object in rest will stay in rest. Gravity also make this work. This is a fun project that kids will love and can also learn some science!
 
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Step 1: Buy the stuff

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To build a marble roller coaster, you will need:

*Foam pipe insulation
*Razor knife works best
*Electrical tape or duct tape or masking tape

Step 2: Cut the insulation

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First you will need to cut the insulation into 2 halves. The ones I have bought had one side almost cut and I just had to cut one other side.

Step 3: Make a loop

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The loop is the most interesting part of the coaster. All you have to do is make it look like a loop and then put tape on it. Make sure the tape is completely stuck to the foam and not sticking up so that the marble will have a smooth ride.

Step 4: Attach the end of the loop to the end of another half

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This will make the  coaster longer. Just put the 2 ends together and tape it. do not let the tape stick up or else the marble will bounce off the track.

Step 5: Add more halves

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The longer the coaster is, the more enjoyable it is. you will be able to do more loops and turns.

Step 6: Put up on the wall

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You will need put the coaster up on the wall. I would start with putting it on a staircase if possible to gain speed. If not, just put it high up on a wall. 

Step 7: Enjoy and Experiment!

You can change how you make a loop by making smaller or bigger and just have fun with it!!
KaronS6 days ago

Eat it

wilgubeast2 years ago
Cool project. Try to light your photos a bit better next time, but this build looks like a lot of fun. Definitely a precursor to permanently affixing the track to the wall. Also, can the cars manage that loop?
mnieb1 (author)  wilgubeast2 years ago
Ok. Thank you for the input. The marbles can make the loop if if is the right size and if the marble is going fast enough.