I still have my old Game Boy, and it still works. Link's Awakening is probably my favorite Zelda game. Another lesser-known game I enjoyed is Bionic Commando: Elite Force. I could beat Super Mario Land in ~50 minutes, plus there were the good times spent playing two-player Tetris with a friend.
As for the Big Wheel - all the kids had them back in the day, but they were so poorly made. The wheels would crack in no time, and eventually flat surfaces would form so the wheel would turn awkwardly or stop altogether. The Roller Racer definitely trumps the Big Wheel in my book.