https://www.amazon.com/Crawling-Protector. s-Toddler-Walking-Kneepads/dp/B0861PZ7QM/ref=mp_s_a_1_7?dchild=1&keywords=baby+knee+pads+for+crawling&qid=1597216588&sprefix=baby+knee+pads&sr=8-7

I used these with my kiddo. They are just anti-skid. The only issue I had was they kept scrunching down because of her chubbiness.

As far as worrying about her banging her knees alot, whats going to happen is going to happen. Shes going to get bumped around, she's going to fall while learning to walk and bump her head. Just don't project panic and rush upon her and she'll pick herself up again.