If you go to your local Walmart, they've currently got Family Size boxes of certain General Mills cereals (Lucky Charms, Reese's Puffs, Cinnamon Toast Crunch) with two Mattel coupons on the backs.
One is a Barbie coupon, one is a Hot Wheels coupon. Both of them are for $5 off of a $30 purchase of the brand on the coupon.
I've got a box of Lucky Charms with the coupon, and plan to use it in the future. They have a 12/31/15 expiration date, by the way.
So, you can save it for when a specific 2015 batch you wanna get comes out.
Just a friendly tip for those interested. :)