Can't add much else to the other reviews here. I too bought it for a six year old for a school project on Victorian scientists. It's not too detailed, but includes enough information for an early reader (who asks questions A LOT)
This was a very useful introduction to Charles Darwin that my daughter who was 6 at the time found very helpful in putting together a school project on "a famous Victorian". She loves this kind of stuff and it was at a good level for her, although she is an excellent reader and very enthusiastic about history.
Bought as a stocking- filler for our twelve year old grandson, this book interested him so much that he has now gone on to research Charles Darwin by himself. Great illustrations & a wonderful first introduction to a great man.