Marion Cocklico studied graphic design at Pivaut (Nantes) for four years before becoming an illustrator. She's worked with over thirty different French publishing houses since 2008 including Gallimard Tourbillon and Larousse. She lives in Paris. The Big Steps series, including No More Nappies and I'm Starting Nursery, are Marion's first titles for an English publisher.

Dr Amanda Gummer is a research psychologist specializing in child development, with over 20 years experience working with children and families. She has set up three organisations - Fundamentally Children, FUNdamentals and the Good Toy Guide Ltd - all of which promote the value of play and positive parenting in child development. Amanda is frequently in the media and on expert panels for child-related issues, as well as being the British Toy and Hobby Association's spokesperson for their Make Time to Play Campaign.