My gameboy still works and I figured out you can use a soldering iron to fix all the dead lines in it. Only problem is I accidentally scratched the screen trying to repair it but it is barely noticable.
Hmm... Didn't it come out right after the Atari Lynx? I think the lynx was much more of a "Revelation in gaming" than the gameboy was. Gameboy just had more money to be thrown into marketing and production. That's what really killed the lynx I think. Just an opinion though
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.