Science Club - Soap Boats

It's amazing what you can do with cardboard, soap and a bowl of water. You cam make soap boats. The students had a good time and so did I. All you do is cut a piece of cardboard into the shape of a boat. Put a notch in the back for the motor and put a small piece of soap in the notch, set it in the water and watch it go. You can also drop a little dish soap on motor and watch it go. It all has to do with water surface tension. You have to change the water after each run. Really fun.