Have you heard about ACEO's? I am completely obsessed with them at the moment - the title had me all curious at first, so after some investigation I found out they are tiny pieces of art work that can be traded and collected, they can be in any medium so long as the dimensions are 2 1/2" x 3 1/2"
Mostly they are in what I would call 'ART' mediums like pencil, paints etc - but anything goes!
And here is my very first attempt at an ACEO - you never know, it could be worth millions if I ever become famous!
for the wiki definition click here