Reader Rabbit: Kindergarten starts off with Reader Rabbit, Sam the Lion and Page (a floating book with eyes) aboard the Dreamship, when a large sheet of bubble wrap captures the ship and pulls it into to Point Palace (a palace that holds all pointy objects). The group gets out of the ship and meets up with a lady turtle that is in charge of collecting all of the sharp objects.
Now you might be asking why a place would need to keep all sharp objects under lock and key. That is because the place where the Reader Rabbit gang has landed is Balloon Town, a place where the all of the buildings (except Point Palace), land and basically everything is made of balloons.
The turtle tells them that they can get their ship back if they could just get into Point Palace, unfortunately there is a 'bull-dozer' in front of the door (no, not the construction equipment - a sleeping bull), and the only thing that will wake him is if you collect five instruments and play them next to the bull.
Completing tasks and playing games gathers the instruments. After a few finished games, you receive a piece of one of the five instruments (a keyboard, flute, drum, tuba and clarinet). Eventually you gain access to the tower after matching shapes, colors and letters, or completing words and patterns.