(and also iPhone cases and skins and framed prints and such)
Play is so good for you, especially if you are doing anything creative. We have two kids, so we are constantly reminded of the benefits.
I drew this in my sketchbook, was happy with it, then tried to draw it larger on nicer paper, and it didn't look as good. The magic that comes from the spontaneity of a sketch can sometimes be lost when trying to do a good copy. So I scanned my sketchbook.
Check for other available drawings and signed prints.