Cracked has a great article posting the worst 20 baby products ever invented.  You can see the entire list here but these are a few of my favs:

**MANUAL SNOT SUCKER

Just the idea made me puke in my mouth a little bit.

**PO-KNEE

You just know every creepy uncle and local pervert thanked the heavens above for this pervtastic item

**3rd Arm

Childhood obesity?  Bitch, please!