Use the tape to attach the 3 straws to the side of the bottle so it stands up, upside down.
Pour about 2 cm of vinegar into the bottle.
Wrap the baking soda up in the kitchen roll to make a little parcel.
Choose a launch site outside. It needs to be on a hard surface.
When you’re ready to launch, drop the baking soda parcel into the bottle, quickly add the cork, put the rocket down and stand back!
Warning – make sure you have a clear empty space and keep observer well back from the launch site as the rocket shoots up very quickly.
