Have been playing a lot with my EOS M. Being so small, i can always carry it out with me or in my big side pocket.
Recently i took out my old toys for my DSLR to mount onto the EOS M.
The Diana F+ Lens Adaptor - Canon Mount (you can get one here). I mount it with the 75mm and Super wide angle lens. Its fun to try all that out the old toys for that lomo feel.