To make this you'll need:
7 lolly sticks
3 rubber bands
a milk bottle lid
cotton balls or other soft objects to launch
glue to stick on milk bottle lid.
Why don't you try one of these experiments?
Launch an object from the catapult and measure how far it travels each time.
Launch different objects from the catapult and measure how far each object travels.
Compare catapults. Build more than one. Launch the same object from each catapult and measure how far it travels.
Floating Ball Game
We made this game and thought you might like to try it at home.
You will need: thick paper, bendy plastic straws, blu tac, foil and sticky tape
1 Cut out a circle from the thick paper. Make a cut into the middle, then bend the sides around until you have a cone shape. Stick the cone together.
2 Cut a small piece off the end of the cone to make a hole.
3 Push the short end of the bendy straw into the hole. Then cut a length off the bottom of the straw.
4 Wrap the blu tac around the bendy part of the straw. Slide the straw down through the cone until it is resting on the bottom of the cone. The blu tac will seal up the hole.
5 Make a ball out of the foil, it needs to be about the size of a grape.
6 Put the ball in the cone. Bend the end of the straw and blow!
Can you catch the ball in the cone?