Check your Walgreens store to see if they have Jell-O priced at $0.14 each. If so, you can get them free with the $0.50/2 coupon from the 12/9 SmartSource insert.
Buy 2 Jell-O Gelatin Dessert Mix 3 oz (various flavors) at $0.14 each
Use $0.50/2 Jell-O Gelatin or Pudding from the 12/9 SmartSource insert (expires January 9, 2013)
Free after coupon
You may want to purchase 4 and use the $0.50/2 coupon so your total is not less than the coupon. This still makes these really inexpensive.
Thanks to Wild for Wags  for the deal and photo!