Make the pudding according to the package and put in fridge for 5 mins. While it's setting, take Oreo's and crush.
Stir into the pudding 3 cups of the Cool Whip and half the Oreo's that you smashed.
Now that it's all mixed up, pour into a baking dish that you can serve it in.
Take the remaining amount of Oreo's and pour on top.
Refrigerate for 1 hour at least.
Take out of the fridge and place Milano cookies about half way down. You can also add gummy worms on top too! Serve!