Looking for Spongebob playing cards but also a miniature replica of a British canon circa 1832? Both can be found beneath the ground, at the Game and Hobby Zone in the Cumberland Terrace (between Yonge and Bay station).
I went looking for jigsaw puzzles and I was not disappointed. They have loads of them, and not all of them made out of lame pictures of deer in a field or weird half-naked elfish women (you guys know the puzzles I'm talking about...)
Oh, and it's a great place for stocking stuffers-- they have these really cute Smurf figurines. I wanted to buy them all but stopped myself ($5 a pop!)