Trebuchets class

This was one of my favorite Explore It/ Design It science classes this year. The were put into small groups. Except A.J who I made work alone. In the groups the kids had to make a working trebuchet out of a yardstick and two one gallon jugs of water. Using tape and weights. The last class we taped off on the floor and the each made two paper ships that were placed in the taped off erea that was supost to be our water and placed their trebuchets all around the floor and got to shot at the other groups ships.