Things that we collect as side items would be perfect so long as they're not R rated and safe for kids to handle. Remember, I only need a dozen or so of each type of item and they don't have to be identical although that would be fine too.

Pens
Postcards
napkins
beads
Keychains
souvenirs from hotel gift shops
bungee cords

Just nothing that was used for gambling.

I hadn't thought of Gambler's General Store but that's a great idea if I can't gather enough before I get to Las Vegas. The offer of help paying for items is most appreciated. I'd like to see if enough can be gathered without spending anything though.