A balloon A straw A piece of string 3 to 5 meters long that passes easily through ... This jet of air functions like jet force and propels the balloon forwards. Rocket engines function according to ...

Rocket template (download below) or plain paper Scissors (grown-up use only) Sticky tape Felt tip pens or colouring pencils Paper straw From the leftover paper from which you cut out your rocket ...

A balloon is taped to a straw. The straw is free to move along ... The movement of the balloon along the thread is similar to the motion of a rocket at lift off. At lift-off, hot burning gas ...