- Warum gibt es uns?
- Was Kinder wissen wollen – Woher kommen Sommersprossen?
- We're All Wonders
- Were I Not A Girl
- What Am I Doing?
- What Color Is Your Hair? Sense & Sensation Books for Kids
- What Happened to You?
- What We Left Behind
- What's Alive?
- What's for Lunch?
- What's Missing: Faces
- What's That? Body Parts Book for Toddlers (Baby Professor Series)
- What's That? Body Parts Book for Toddlers (Baby Professor Series)
- When You Became You
- Where Do Babies Come From?
- Where Do Babies Come From? Read-Along (Enhanced Edition)
- Where is the Baby
- Where is the Baby. Di manakah bayi
- Where is the baby. Gdzie jest Dzieciak
- Where is the baby. Missä vauva on
- Where is the baby. Onde está o Bebé
- Where is the baby. Où est le bébé
- Where is the Baby. Unde este bebelușul