Guests can decorate cupcakes with red, yellow and black sprinkles.
Create a cupcake tower with cupcakes frosted white - place little checkered flags in each cupcake. (You can them yourself on the computer and glue to toothpicks.)
Serve sandwiches cut out with a car cookie cutter or circle (use the top of a glass) and call them tire-wiches.
Oreo cookies (tires)
Jell-O poured into see through cups with Hot Wheels fruit snacks floating in the Jell-O.