Stuck inside the house on a stormy day, Adam devises a plan to scare his mum. After all, his mum is not afraid of anything, but Adam intends to try.

He dresses up as a clown. He poses as a snake. He masquerades as a monster. None of these disguises frighten his mum. As Adam runs back to his room to try again, he trips and falls down the stairs. Finally, he has scared his mum, but certainly not in the way he intended.

A picture book for young readers, Boo! Did I Scare You? shares the story of an adorable and cheeky little boy who tries to make the most out of a rainy day.