Three Pigs on a Raft

Three pigs, Curly, Pinky, and Floppy, float on a raft down a quiet stream. Suddenly, they feel a bumpity-bump-bump, and the water is no longer quiet. The raft goes up, up, up, down, down, down, tossing about all around. The three pigs cling to the raft through the bumpity stream. What do the three pigs learn from the trouble they encounter? Buy now and find out!