Mario's Early Years! CD-ROM Collection

'Mario's Early Years! CD-ROM Collection' is a compilation disc consisting of the MS-DOS versions of Mario's Early Years! Fun with Letters, Mario's Early Years! Preschool Fun and Mario's Early Years! Fun with Numbers. These three educational games were developed by (Mindscape). This disc also appeared on a compilation set titled Mud Pies, alongside  It's A Bird's Life and CardShop Plus!. The cover features Mario wearing green overalls instead of his usual red. While Fun with Letters and Fun with Numbers are identical to their standalone versions, the CD-ROM Collection version of Preschool Fun includes a brand new world, Time World.