Ice Balloons

We made colored frozen spheres using water balloons, food coloring and the freezer. We tried to freeze them outside, but missed the coldest nights, so had to resort to the freezer. Extra lesson objective: freezing point.
I had hoped that we could stack the spheres and make ice men, or something, but they were odd-shaped and well, freezing. So we set them in the sun and admired the frozen bubbles and the crack lines from dropping them...
And then it got fun. Leif asked if they could get hammers and smash them, so, they did. A boy with a hammer is a happy boy.