(Child/Parent) Prepare cake mix. Using an ice-cream scooper, ladle batter into flat-bottom cones, filling halfway. Place cones in muffin pans, and put a coil of foil around each cone to stabilize. Bake for 30 to 35 minutes; let cool.
(Child/Parent) Snip off a corner of a resealable plastic bag; fit opening with a star-shaped decorating tip. Fill bag with two 12-ounce cans of whipped vanilla frosting. Pipe frosting on top of cones to look like swirled ice cream.
(Child) Top frosted cones with red, white, and blue sprinkles and serve.