Buoy Wonder: Today is a big day for Bill. He's entering his boat in the Model Boat Show! But George discovers that the boat sinks and to keep Bills hopes for a prize afloat, he decides to build a new boat. After some trial and error, George finds out which building materials sink and which float. EDUCATIONAL OBJECTIVE: To learn about sinking and floating. Roller Monkey: A monkey on roller skates seems unlikely until Mr. And Mrs. Dulson ask George to wear a pair in front of their toy store to attract customers. George's skating rolls out of control, so Hundley steps in to help. Soon George, Hundley, and even Gnocchi find themselves learning about momentum and inertia at a rapid downhill pace. EDUCATIONAL OBJECTIVE: To show objects in motion. To understand the power of momentum.