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My kiddo is 21mths old and loves this book. It's colourful, uses inclusive language and gives an informative but appropriate account of how babies are made. I also love that it talks about the relationships when making a baby and that people anticipate and look forward to having a baby.
Great introduction to babies when pre-schoolers start to become curious. It's not about Mummy and Daddy so brilliant for donor conceived children and adopted children. Equally relavant to all curious kids who aren't ready for full explanations.