This awesome sub is powered by...baking powder!
How, you ask! Well, it’s quite simple. When water comes into contact with baking powder, carbon dioxide is released and the gas causes the sub to surface. When all the carbon dioxide is released, it dives down!
It’s a little bit of science but tons of fun!
You can do it in the bath, in the pool, in fact anywhere you can find a big tub of water but we don’t advise doing it in the fish tank!