Label your cups! A sharpie or marker would work fine, and you can let the kids decorate their own cups!
Fill each cup with chocolate pudding and crush up some oreos (I put them in a ziploc bag and let my little one smash them up!) and then add them to the cup.
Stir the chocolate pudding and crushed cookies together and add your worms!
Let chill in the fridge for about 15 minuets then enjoy!