My youngest son is fascinated by drawing, and will sit with a box of crayons and a stack of paper for hours, drawing all sorts of things (pirate ships are a favorite). He'll ask me to draw things for him as well, and I try to draw what he asks for. Last weekend he asked me to draw a monkey. I said, "OK, I'll draw a monkey", but I found that I could not. I asked my wife, "Hey, how do you draw a monkey?" She wasn't sure. We researched it (Things That Go, by Anne Rockwell, was particularly helpful!), tweaked it, polished it, and this is what we ended up with (executed in Crayola brown on Staples brand multi-purpose paper):