A tiny minnow wearing a pale blue bowler hat has a thing or two up his fins in this underwater light-on-dark chase scene.

When Grandpa's lucky hat goes missing during a college football game, detective Jeffrey Bones and his friend Sally help look for it.

Harold is a very special bear who always wears a woolly hat, so when a crow steals the hat from him, he tries to win it back.

This math mystery takes place at school--when a purple, sparkly cone-shaped princess hat goes missing! Margot needs her hat in time for the school play (today!), so Charlie and his dog companion, Watson, are on the case--finding evidence of sparkles and purple paint and keeping on the lookout for geometric clues that might lead to the missing hat.

Dog and Hat are practically inseparable, and when the dots on Dog's favorite shirt disappear down a storm drain, the two friends descend into the sewers where they encounter many obstacles and unforeseen dangers--and come face-to-face with an alligator.