When did this happen?

Mstr A starts Junior school today.
I remember starting junior school. i felt so grown up!
Although he is all grown up - reaching my chest and heavy enough to topple me over when he jumps on me!
In this picture, I could place his head in the palm of my hand and his feet would just about rest in the crook of my elbow!
How did that happen?!
Labels: growing up., Mstr A, school