Mario's Early Years! Preschool Fun, released in Europe as Mario's Playschool, is an educational Mario game released in North America in 1994 for the MS-DOS and SNES developed for children under six years of age. The game is set around a group of islands, where each island teaches a different subject to the players. The overall design of the game is based of Super Mario World, where the character graphics are taken from it while the music features rearrangements of various tracks.

This was the last of three educational games to be released in the Mario's Early Years! series, the others being Mario's Early Years! Fun with Letters and Mario's Early Years! Fun with Numbers; as such, the game is very similar to the first two games of the series. The main difference between this entry is that the subjects in the islands cover a more general learning, such as learning opposites, colors, and animals. The game, alongside the other two Mario's Early Years! titles was re-released under Mario's Early Years! CD-ROM Collection in 1995.