Okay, heres what I drew. I wanted to do little Bo-Peep since she's who first popped into my head when I read this challage. The reason the background is white is because when I tried to colour the background the picture would mess up. The picture mostly goes with the first line of the rhyame "Little Bo-Peep lost her sheep and didn't know were to find them" But you could go with two senarios, like She's the one who killed her sheep or She just found her little sheep....as fresh lamb chops.
"Little Bo-Peep lost here sheep and didn't know where to find them
Leave them alone and they'll come home, wagging their tails behind them"
Thats the whole rhyme.