#2: ThighMaster (1991)
The ThighMaster is a resistance tool that you squeeze between your thighs. Sure, this may help you get better thighs as part of a bigger diet and exercise regimen, but many moms thought that they could watch TV, do five reps with the ThighMaster, and then get toned legs. When they discovered it wasn’t magic, they quickly put the product away into the corner of the closet, never to be seen again.

provided by constative.com
Also, the product was endorsed by the late Suzanne Somers. While mom was watching this commercial to look like her, the commercial was a transition to puberty for many young men.