There is a sense of praise in that, considering Picasso attempted and eventually managed to draw with the open mind and innocent simplicity of a child. He really went full circle except his lines are ultimately drawn with the transcendence, determination, and intuition of a mature mind formed by a turbulent life.
So, yes, a six year old would be able to draw similarly, except the minor differences are exactly the differences between a life fulfilled and the vast horizon of opportunity of the tabula rasa.
Admittedly, the attached drawing was done by an even younger person than the proposed six year olds, and after subtly pointing out that it couldn't actually be, as was his claim, a portrait of me because I have even less hair than that, he took a long and silent look at both his drawing and my hair (or lack thereof), and proceeded to wisely change the subject. You never know what goes on in the mind of a child but there is a certain intuitive wisdom there representing a desirable state of innocence from which true creativity can be spawned. Perhaps Picasso did finally reach a state of nirvana.