Too Busy to Swim

Asa moves in next door to Mario, and the two become best friends. They do everything together. One day, Mario asks Asa to go to the pool. Asa says he's too busy to swim. Both boys are sad not to be together that day. When Mario gets home, Asa tells him he doesn't know how to swim, and that's why he didn't want to go. Mario promises to teach Asa how to swim.