As the Sonic the Hedgehog series of platform games has grown in popularity, its publisher Sega has expanded the franchise into multiple different genres. Among these are several educational video games designed to appeal to young children. The first attempt to create an educational Sonic game was Tiertex Design Studios' Sonic's Edusoft for the Master System in late 1991, which was canceled despite having been nearly finished. When Sega launched the Sega Pico in 1994, it released Sonic the Hedgehog's Gameworld and Tails and the Music Maker for it. Orion Interactive also developed the 1996 Sega PC game Sonic's Schoolhouse, which used a 3D game engine and had an exceptionally large marketing budget. In the mid-2000s, LeapFrog Enterprises released educational Sonic games for its Leapster and LeapFrog Didj.