Air Powered Boat

i made this craft from a project i did at school with my classmates we made a small cardborad car with the exact same idea and purpose.

For this project you will need a,

straw,

ballon,

piece of wood ( aprox 20 centremeters long and 10 centremetres, i have just rounded it to the closed number by the way),

a cable tire or 2 elastic bands,

1. To start with you will begin with the piece of wood cut it too what shape you want.
2. Place the straw down the ballon.
3. Get the cable tire or the elastic bands and rap the ballon and straw with an elastic band or cable tire, only use one of the elestic bands because you will need the other elastic band later, even if you are going to use the cable tire you will need one elastic band for later.
4. Now is the time to use the 2nd elastic band, rap around the piece of wood, straw and ballon (shown on the picture).
5. Tip: use a metle straw if you have.