Worst video game accessory

[housenuts]

I just posted about the power glove in another thread. I'm trying to think of the worst video game accessories but will need some help before a poll can be made.

some i've thought of

NES Power Glove
Sega 32X
NES R.O.B. (Robotic Operation Buddy) I don't know anyone who ever had one of these, or how it worked, but I remember it just looked ridiculous
SNES Super Scope 6
Virtual Boy (not sure if this was any good)

Some of these ideas were just ridiculous. The 32X was such a flop it was funny. Can you think of any others?