The file
A plastic stick that shouted commands at you and sped up until you failed, then said something sarcastic about it. Bop It was Simon for the '90s, portable and louder.
It was the toy of every long car ride and every sleepover from 1996 on, usually played by the one kid who could get past 100 while everyone else watched. Later versions added Flick it and Spin it; the original three were enough.
Sources: Wikipedia — Bop It