Chick has found something strange in the farmyard. Is it a rock? Is it a brick? Whatever could it be? Duck, Frog and Dog all have their own ideas. But the four friends get a big surprise when Tortoise pops her head out of her shell - 'Boo!' This simple picture book with its bouncy rhyming text will delight pre-schoolers and help encourage their language development. Bright, contemporary artwork perfectly complements the text and adds to the fun. Part of the new 'Ladybird I'm Ready to Read' series, it is perfect for reading aloud and sharing with young children.