children drawing perspective. what age?

[fuckadoodlepoopoo]

What age do children first start drawing basic perspective? Such as a path getting narrower as it gets further into the distance?

we were taught to do that at about age 10 but have seen children naturally do it younger

DS has been being taught about it - he's 9 and in year 4

My 7 yr old did it last week, I was surprised as I remember learning it in secondary school

Thanks for your replies.

I wasn't sure when they were expected to be able to do it and was a bit surprised as my dc started doing it the other day. My dc is 6.5 so i thought it seemed early. I couldn't remember when i did it though and as my oldest child I've nothing to compare to.