Spud Guns

In class we have been trying to make spud guns . Both times we did this it did not work but we had fun trying. First we tried normal plastic, bendy straws which bent as soon as we stuck them into the potatoes they bent. Today we tried making them again but with two kinds of firmer straws.  They went in a lot easier but when we went to shoot them they just flopped out. This was fun although it didn't work!!