The only one i can think of, but would be really good for kids, would be LocoRoco. Fun for adults as well, just a solid game overall. Nothing really other than that, except emulators. SNES library obviously. Genesis has the Sonic series. Metal Slug on Neo Geo would work well with kids too. From what I read, the actual PSP Metal Slug Anthology release runs the games worse than the emulator (which i use and is perfect), so stick with that. But LocoRoco definitely. There's even a Christmas themed demo/level for it out right now.