I shared this book with my three year old granddaughter, who was probably just at the lower end of the age group that it is intended for. She enjoyed the beautiful illustrations and listened intently to the story, but she has yet to start nursery and fully understand the message behind this book.
Older children will understand about hurtful comments; some will have been on the receiving end, some will have thoughtlessly hurt others. I feel strongly that learning about the damage that such comments cause, at a young age, will guide many to be more considerate. Those on the receiving end are encouraged by the book to share the hurt with parents or teachers - a problem shared is a problem halved.
This would make a great book for classroom discussion and also for children to borrow and take home to share with parents. A valuable addition to any children's library.