There's a great example of something similar by a bride on The Knot. Click here to visit her planning blog and wedding pic's. She has some great ideas, including this one that you see below. She did these fun bags as wedding favors for all their guests - not just the kids! These would also be a nice surprise for each guest at a dinner party.
I also loved this idea from Modern Bride to use a metal lunchbox. Isn't it cute?
SHOP: World Market, http://www.worldmarket.com/