In the storybook, 'Drago Super Scientist', the Cheeky Monsters build a water bottle rocket and then launch it into space. You could build your own rocket, too!
When you pump air into the bottle, pressure builds up inside. As you keep pumping, the force of the air on the water eventually becomes strong enough to force the cork out of the bottle. As the water rushes out in one direction, the bottle pushes back in the other direction. This forces the rocket upwards – BLAST OFF!
Make sure a grown-up is with you to supervise your launch and that all spectators stand back. Your rocket will launch suddenly and with force. Do not approach the rocket once you have started pumping, even if it looks like nothing is happening.
Here's how to make Drago's rocket - prepare for blast off!