baby knee pads, worth it?

[tattoo_mama]

I bought some they cost me $40, DD hated them and they didn't help her crawl any better if anything they hindered her cause they annoyed her...

[MummyNaomi]

We have tiles in most of the house and DS crawls like a madman over them and often has little bruises on his knees/legs from all his climbing, but it hasn't slowed him yet.

I too think its a ploy, and as Beautitude said - Their little knees are made for crawling!