A CD

A bottle top from a pump bottle

A balloon

A piece of blu-tack

First we filled out a prediction about how we thought it would move,how far it would go  and the distance it would travel.

When we finished that,we went to a spot to experiment.

How to make it…

1. I got my CD and put blu-tack around the hole.

2. Then I stuck the bottle cap on,by making it stick into the blu-tack.

3. After that I blew up the balloon and stuck in onto the bottle cap.

4.Then i experimented with different kinds of surfaces,Eg. wood carpet and lino.

It worked the best on the lino because it was slippery.

Harmony was choosen to test hers out on a incline.

At the end we had races to see who’s would move the fastest.

By Olivia Bradley