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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!

Step 1: Buy the Stuff

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

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

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

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

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

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!!
<p><em><strong>you could also make it at a sharper angle so more loops or hills could be involved...</strong></em></p>
<p>Eat it</p>
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?
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.

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