This is a boisterous rhyming story about a little boy overcoming shyness. My mum said to me today, You silly little moose - You're so shy, you wouldn't say, 'Boo!' to a goose! A timid boy doesn't want to play with the other children at a birthday party. Eager to prove to his mother that he's not really shy, he hunts round the garden for a goose! Instead he finds a monster and creeps up behind it, shouting, 'BOO!' - but it's not a real monster, it's just a clockwork toy. Next he sees a tiger. But the tiger isn't scared of him either - it's really a cat. Gradually the boy builds up enough confidence to jump out on the other children, who are dressed as children, but they all tell him to Go away!. But they're just teasing - they do want him to play with them really, and as a reward for trying so hard to join in, his mother has a special treat - a toy goose which the boy calls BOO!