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There are some great free rewards online! Good alternatives to the treasure box.... or these rewards can help you buy less for the treasure box.
Necklaces: necklace link 1 necklace link 2
Bracelets: bracelet link
Coupons: coupons link 1 coupons link 2
Some of the necklace cards will fit in a lanyard pocket. (Walmart has these.) Others could be used on a chain necklace. I have bought some in the past from Oriental Trading.
Bead Chain Necklaces