Some popular ones are 'The Chronicles of Narnia' series. It takes children to a magical world full of talking animals and epic battles between good and evil. Another is 'Harry Potter' series, which follows the adventures of a young wizard in a school of magic. And 'Alice's Adventures in Wonderland' is also very well - known, with its strange and wonderful world that Alice explores.
Well, 'The Lord of the Rings' can also be considered in a sense, though it's also read by adults. It has a richly detailed fantasy world. 'Percy Jackson & The Olympians' is great too. It combines Greek mythology with modern - day settings for kids. These books often have elements like magic, mythical creatures, and heroic quests that make them so appealing in the genre of children's fantasy fiction.