To make this awesome catapult, you'll need two clothes pegs (the kind with a spring), some glue, a screw-off bottle top, a lollipop stick, a sheet of card or foam board, and some ammo to launch at your victims!
Grab the card, glue and the clothes pegs. Glue one peg to the card then glue the second peg on top, as in the picture.
Glue the bottle top to the lollipop stick. Make sure it's upside-down so it makes a cup for your ammo to sit in.
Now glue the lollipop stick to the top peg.
When all the glue has dried, you're ready to rock! Pop some ammo in the cup (wet, scrunched-up toilet paper works well), pull the stick down and fire away!