Philip's Children's Atlas by David and Jill Wright
Book review: This children's atlas is aimed for 7-12 year olds. For that age group I think it is excellent.
The book is full colour with maps and photos and images throughout. It starts off with some general bits and pieces about the planet Earth, like where it is in the solar system, and explains things in simple terms. For example population density is explained very well. Then it looks at areas of the world in more detail starting with Europe. This includes a focus on the main countries that children will be learning about at this time at school. There is also a focus on all the 50 states of the US which is useful general knowledge to have.
All the pages have just the right amount of info on them for the age group. They are in bite-sized chunks. Of course there could be more info but that's what the internet is for.
My 9-year-old daughter is probably best placed to give an opinion. She says this book is good because "it tests your knowledge, has brilliant facts and is easy for children to understand."