It is the third day of rain in a row, and brother and sister are sick and tired of it. Nothing sounds like fun, until Momma suggests they have a Sick and Tired Day. "What’s a Sick and Tired Day?" A day to do things they would only do when they are "sick and tired" of everything else. Suddenly morning play, snack time, lessons, lunch and even clean-up time become a game of finding things they have never done before.