I find Canadian pennies in my house ALL the time...I have no idea where they come from, I think I must get them as change or something and just not notice. One time I got some wierd old european coin as change out of a soda machine. I think it was Russian or something It was sort of like a quarter but a little smaller. It was made in the 40's from what I can tell. Ive noticed soda machines have some wierd stuff in em sometimes!