George's curiosity about bones leads him to climb the dinosaur skeleton at the museum but he ends up falling off and breaking his leg. George must wear a cast for a few weeks and stay home. Hundley stays with him as his monkey sitter. George begins in a wheelchair and does not know how to use it, but Hundley teaches him how to navigate around the furniture in his apartment. Soon, George can walk on crutches and Hundley helps him out in the same way. Later, once George can walk on his cast, he goes to places like the park with Hundley.