"The interactive element of the book--sliding the picture of the bird, open and closed--means that there's a certain 'playability' to it, which adds an extra element of fun, especially if you want to play peekaboo with the birds. Because it's a nice study book too, this means that it would be a nice one to take along in the pushchair or to play with in the car, as well as being read at storytime or for fun at any point in the day" - BookTrust...