We had a grandmother who at the age of 50 had a third child. Girl 3 years. And all day long this happy mom bite our brains:

Why is yours not reading yet? My wolf started reading at 3 years old. Why don’t you go to the circles? Here Polinochka goes to English (aga, at 3 years old), drawing, music and ballet!

– Aunt Ol, how does your Polka go to ballet if she has no knee cups?

You would see her face. It has changed more than ten times. She looked at her field along and across, pulled her legs, bended, then rushed together and left without saying a word. Thus, three children grew up, she knows everything, and the fact that the knee cups are formed by 5-6 years, neither by hearing nor by spirit. Take your arms ;)