Random GMing idea #276: Ask each of your players to bring a game-related prop to the next session.
The prop could be anything that enhances the game for the whole group — a plastic sword, a hand-drawn map of the team’s HQ, a bag of plastic Pieces of Eight, a mix CD of background music, etc.
You’d have to mention upfront that it doesn’t need to be a complex prop, and I’d recommend awarding bonus XP or offering some other in-game incentive. Plus, of course, bringing a prop or two yourself! But if it worked, wouldn’t this be neat?