X-mas gift sketch: Superman

So what do you do when your SO has five nieces and nephews but you're poor as a pauper and can't afford to get them X-mas gifts? In my case I used my one super power to shock and amaze young ones by sketching. Got some tips from their grandma on what sort of stuff they liked and went with it.
I spent less than an hour on each one. I know they are far from perfect and riddled with inaccuracies and proportion issues up the wazoo, but that's the great thing about drawing for kids: they don't care.

Superman flying. Pretty basic, but I'm still not sure if he's proportioned correctly.

These are the raw sketches and have not been digitally modified in any way other than cropping. Mechanical pencil on standard 8 1/2 x 11 printer paper.