When you were younger this was the coolest thing in the world. The power glove. It was advertised as a glove you wore that let you play your Nintendo games but using your arm. It had a joystick on the side and it was advertised so well that all the kids had to have it. I remember seeing it in the Wiz, a movie that was pretty much an hour and a half Nintendo commercial. I was pumped to play action games with it. It would be like you were in the game.
And then you tried it... Basically it was you flailing you arm around hoping for something to happen. The game I remember using it for was punch-out. That made the most sense, it was a boxing game. You would dodge in person and then counter like you were little mac. But no matter how well you did the game did not respond. It was hard to get by even the first guy.
Ultimately you ended up using the controller that was on the glove so it kind of defeated the point. But it did make you feel cool when you had it on :p. I guess this was the starting point that eventually lead to the Wii in a way. Which worked much much better. There were other accessories for the nes like light gun that worked well and duck hunt is still playable today. But the glove, not so much.
