I purchased this book for my 3 grandchildren ages 1-4 and each one loves this book.Around 6 months they enjoy me pulling the mouse in and out of each page and by 1 year they themselves learn to pull the mouse in and out. My 3 yr old now loves to listen to the story too and can't wait to do it again. When asked to "Go get a book to read", it is always the first one they choose. It definitely is a favorite by far and I highly recommend it. This Christmas I purchased 5 copies through Amazon for gifts for my friends grandchildren. All kids love it and because they love it so much they themselves make sure the little mouse always gets back in his pocket. I've had my copy for 3 yrs.