it is fun to do and can be completed within minutes. I hope you will enjoy doing this instructable and will be able to learn something at the same time.
Step 1: Materials
Acetone is commonly used as a paint thiner and can be found at your local hardware shop or at amazon.com.
This can be an empty pot of jam or a beaker.
expanded polystyrene (styrofoam)
You can buy styrofoam cups or use any other piece of styrofoam you have.
safety goglesYou might consider using these because acetone can cause permanent eye damage.
Step 2: Prepare the acetone
Step 3: Melt the Styrofoam
Then wait one to five minutes for some of the acetone to evaporate. Wait one minute if you want it to mold the plastic and five if you want to shape it. The more you let the acetone evaporate the more solid it will be. You might even want to mold it while its still "liquid".
Here's a video that demonstrates the melting process.
Step 4: Other usefull info
If your plastic becomes to hard to work with dip it in some acetone to make it soft again.
The plastic fully cures in about 12 hours.