I stumbled across a youtube video today, and looked at a few related ones, about past toys that were inappropriate, bizarre, dangerous or offensive.
And it's not just obscure novelty toys either, as there are toys from big brands in these videos, including Lego (concentration camp), Barbie (pre-pubescent doll that can grow breasts, a pregnant doll, and a pole dancer doll), Dora (toy shaped like a sex toy), Cabbage Patch Dolls (a motorised mouth that would eat and crush kids fingers), Play-Doh (a mould and brown dough to make your own poo), Marvel (firing crotch missile) and Super Soaker (a clear-ish slime gun that you pump to make it fire).

Plus there are toys that are straight-jackets for kids, breast-feeding dolls that come with a vest with nipples for the young girl to wear, a kiddie stripper pole set, a pregnant baby doll toy, a Russian roulette toy, roadkill cat toy, inflatable Titanic slide, an insertable potty training device that creates shapes out of the toddler's poo to make the process more fun... and probably the most disturbing - a hairy baby doll that the kid can shave, which has bushes of hair in pubic places.

20 toys

10 toys

10 toys

10 toys

(some toys feature in multiple videos)

There were more related links that might have some other amusing toys in them.