I really love working with the small size Altoid tins. Here's my latest. I might have gone over the top with glitter, tinsel, sparkly stars, and Dresden trim, but really, can you ever get too showy when it's a circus? I think not.
The little size has just enough room for one roly poly clown and his costumed cat (images from Alpha Stamps).
The foot of this tin is actually a suction cup from an old toy arrow. I got it in those big bags of wooden blocks I found at the Thieves Market on my way to the beach this year.