DS is 3 and a half and loving "There is a house inside my mummy' too! It is cute with a rhyming text and quite easy to make subtle changes as you read it. We read it as "I cannot wait to meet them" etc instead of him/her because we are having twins. DS loves the story and he actually understands it really well. His fav bit is the picture of the mummy asleep on the couch - "Look, it's you Mum!"