Pour all ingredients into a large bowl and toss with your clean hands or a large wooden spoon. Done! I like to serve it in individual cups.
Stores for at least a couple of weeks in a zipper bag or an airtight container.
Notes
Gluten-Free Option
Choose gluten-free cereals. Judging by the list of ingredients on my particular candy eyeballs package, they appear to be gluten-free, but please use your own judgment!
Refined Sugar-Free Option
Omit candy eyeballs and M&Ms. Choose sugar-free or refined-sugar-free cereals.
Vegan/Dairy-Free Options
I'm not sure if store-bought candy eyeballs are vegan (sorry). To be safe - or just to have fun - perhaps try this homemade googly eyes recipe. So awesome!