Shaving my brother`s head

I come from a family of swimmers and it is tradition that we shave when in competition. My brother shaves his head and like to have different and interesting patterns on his head. Two years I shaved a shark (actually came out good) and last year I put lightning bolts in his hair. I`m trying to think of different styles for this coming year and I wanted to know if anyone had any ideas or knows of any websites that I can see different designs it would be most appreciated. Thanks alot!!!