Make cake mix according to box directions for 13 x 9" pan.
Allow to cool for 15 minutes.
Use a large wooden spoon handle to poke holes in cake.
In a medium bowl, combine 2 boxes pudding mix and 4 cups of milk.
Whisk well and pour evenly over cake. Be sure to gently press pudding into holes.
Gently tap pan on counter to try and remove air.
Refrigerate for 1 hour.
In large bowl, combine 1 box pudding mix and 1 cup milk.
Whisk until thickened.
Add 16 crushed Oreos and Cool Whip.
Stir until well blended.
Spread mixture evenly over cake.
Sprinkle 16 crushed Oreos over top of cake.
Add Peeps to top of cake.
Cut edible grass into thirty 3/4" pieces.
With a toothpick, poke hole in end of each Mike and Ike and insert 2 pieces of grass.
Stick each Mike and Ike into cake beside a bunny.