In a large bowl, prepare the pudding per the package instructions then put it in the refrigerator

Remove the cookies from the cream filling and put the cookies into a large zippered bag

Crush the cookies (this is a great task for one of the kids)

When the pudding is set (this takes a minimum of 10 minutes in the refrigerator), divide it into six clear glasses (so you can see the "mud")

Arrange several worms on top of the pudding, with some hanging over the edge of the glasses

Sprinkle the crushed cookies over the "mud", creating the "dirt" layer