Hans Christian Andersen's Fairy Tales and Grimm's Fairy Tales are both classic fairy tales that are suitable for readers of all ages. Hans Christian Andersen's fairy tales were more lively and interesting for children aged 3-6, while Grimm's fairy tales were more heartwarming and touching for children aged 6-12. However, no matter which version they chose, parents should choose a book suitable for their children's age and pay attention to protecting their children's self-esteem and privacy.