I normally don't write reviews, but felt I must as my 2 year old toddler is obsessed with her books. While she loves going through every nursery rhyme with me singing, she's also happy to play with each page by herself for an hour easily. She thoroughly enjoys the 'Old McDonald' page, making the various animal noises and naming each animal, but has a little bit of difficulty closing the pop button (I know she'll get better with this as she ages). She finds the 'Baa Baa Black Sheep' page challenging in terms of getting the buttons back out of the bags, but loves working them through the maze, and will happily work on this page for 20 minutes by herself. The attention to detail and skill in making these books is incredible, and well worth the price for such excellent quality. I'm keen to buy more books in the series and would happily recommend them to anyone and everyone with young children in their lives.