Sam, Sebbie and Di-Di-Di are three siblings who love doing things together. It's Sebbie's first day of school, and he is not looking forward to it. All he wants to do is stay home and watch TV. But Sam convinces him that it will be fun and when he gets to school, he finds that he does enjoy singing, learning his ABCs, drawing, snacking on cookies and playing with blocks. In fact, the morning passes so quickly that Sebbie is surprised when it's time to go home.