These didn't look as much like eyeballs as I had imagined--I think I'll try something different with boiled eggs next time (lots of ideas online!).
1/2 an orange
Stick toothpick in grape, letting it stick out the top a little and put the raisin on that. I tried putting on the cool whip afterwards, just since it seemed messy to put the raisin on top of the cool whip, but that is where it was a bit hard--maybe the spraying cool whip would make it easier! I just used my finger to put on the cool whip--the spoon wasn't cuttin' it! Stick the toothpick in the orange.