Year Two have been making straw rockets. They got a pencil and rolled paper around the pencil. Then they sellotaped the edge and folded the top over two times to make sure there were no holes at the top so that no air would escape.They then sellotaped a rocket fin to the end. They took the rockets outside put a straw inside the rocket and blew as hard as they could to see how far the rocket would fly.
Here are the instruction so that you can have a go too.