Spread pudding into a clear, rectangular serving dish.
Top pudding with crushed Cookies & Creme Pop-Tarts.
Nestle gummy worms into pudding.
Cut S’mores Pop-Tart in half widthwise. Dab a little vanilla frosting on the pastry’s bare side, and use that to adhere the marshmallow to the Pop-Tart.
Sandwich the two Pop-Tart halves together frosting side out to make a tombstone, and decorate one side using frosting.
Stand the Pop-Tart tombstone into one end of the pudding.