Make the crust: Mix 2 1/2 cups of the cookie crumbs in a bowl and mix with butter. Press firmly onto bottom and up side of your pie pan.
Make the pudding: Beat pudding mix and milk in large bowl with whisk for 2 minutes. Let stand for 5 minutes. Stir in cool whip.
Assemble the pie: Spoon a layer of pudding into your prepared pie crust. Using the remaining cookie crumbs, sprinkle a cookie layer over the pudding. Spoon a second layer of pudding on top of the cookie crumbs (depending on your pan size, you will have a little extra pudding). Sprinkle the remaining crumbs over top and add gummy worms!