The original Lunar game, The Silver Star, was remade for Saturn and then ported to PSX and Windows. It was also completely remade for the GBA and again for the PSP.
The second game in the series, Eternal Blue, was also remade for Saturn and ported to PSX.
Walking School was exclusive to the Game Gear, though a remake entitled Magic School Lunar was released for Saturn.
Genesis/Dragon Song is a DS exclusive.
Lunar 3 was announced for PS2 but never came into existence.
Also, if your kids interfere with your gaming, there's always the orphanage option.