There's only two ingredients. That's right, just the cake mix and the pumpkin (15 oz.). No oil, no eggs, no water, nothing else. The end result is an amazing, incredibly moist muffin/cupcake with a hint of pumpkin flavor. Bake at 350 degrees for 20-25 minutes. Add a dusting of powdered sugar, or better yet some homemade cream cheese frosting for added awesomeness.
Cool the kids off with a homemade sprinkler. Take a 2 liter soda bottle, poke holes in it. Attach to a garden hose via a male to male adapter that cost less than $5 at Lowes. Toss over a tree branch and let hang.