Meet six friendly hippos in this exciting addition to the much-loved That\'s not my... series. Babies love these best-selling books with their bold illustrations, textures to explore, and a mouse to spot on every page.- That\'s not my... books are designed to be shared, and support sensory and language development.- Don\'t forget to spot the little white mouse on every page!- DID YOU KNOW...? One That\'s not my... book is sold every minute in the UK!- With over 80 titles to choose from, there\'s a That\'s not my... book for everyone.