Good for parties, and easy to make while watching tv (important criteria for my projects).
Step 1: Assemble!
Chocolate chips (15 or so per katamari)
Whoppers (any malted balls)
Peanutbutter (preferably creamy)
Toothpicks (plain, colorful, or miniswords if you're into that)
Styrofoam base (depending on your presentation, obviously not required for eating)
Gather and proceed!