My 7 year old loved reading this and is able to read it by himself。 The solve-it-yourself picture puzzles were fun and not too challenging。 We’re reading the whole series now， including the ones for older readers （which I read out loud， but doesn’t seem too challenging for 2nd grade reading level） and have really enjoyed them all。 The Young Explorers series keeps the attention span of my 5 year old better than the older series， but we have fun with them all！ The illustrations are also awesome。 V My 7 year old loved reading this and is able to read it by himself。 The solve-it-yourself picture puzzles were fun and not too challenging。 We’re reading the whole series now， including the ones for older readers （which I read out loud， but doesn’t seem too challenging for 2nd grade reading level） and have really enjoyed them all。 The Young Explorers series keeps the attention span of my 5 year old better than the older series， but we have fun with them all！ The illustrations are also awesome。 Very dynamic and fun to look through for clues。 。。。more