Toby Laughs Last (Formac First Novels)

When Toby climbs too high in a tree to rescue a kite, he tumbles to the ground and has to go to the hospital. The doctors stick tubes down his throat and bandage him up. Toby is happy to be alive—but then he realizes that he can't laugh any more. Toby wonders: what part of your body does laughter come from? And what can he do to get his laughter back?