Miyuki-chan In Wonderland

Miyuki, a cute girl, is in over her head. When late for school, she is suddenly transported to another world (Alice In Wonderland style), except that all the inhabitants of the other world are female...and they all seem to be in love with Miyuki. And the world behind her mirror is even weirder. (Source: Anime News Network)

Code Geass: Nunnally in Wonderland

In the all-new story, Lelouch makes the ultimate use of his Geass power for his little sister Nunnally, who loves Alice in Wonderland.

Peter Pan & Wendy

Wendy and her two little brothers are brought to the land of adventures, Neverland, by Peter pan, a boy who will never grow up. In Neverland they encounter exciting events and meet with little fairies, mermaids, Indians, and pirates. Required to act as a mother, Wendy never has a moments peace with all that is happening around her, including breath-taking fights with pirates. Later in the series, they set off to find a buried treasure with a map that they obtain from the pirates. (Source: AnimeNfo)

Digimon: Digital Monsters

Seven kids are transported to the Digital World, a strange place where digital creatures called "Digimon" reside. A group of Digimon soon befriend them and keep the kids out of harm's way. The children then discover they are the Chosen Children, which protect the Digital World from evil Digimon like Devimon and Vamdemon.