Pour milk into large bowl. Add dry pudding mixes. Beat with whisk 2 min. or until well blended. Let stand 5 min. Then, gently fold in 1/2 of the Cool Whip. Be gentle, you want it to fluffy. Set aside.
Arrange wafers on the bottom and around the side of the serving bowl or trifle. Top each wafer with banana slices, feel free to add as much as you like. Then spread a layer of pudding on top. Repeat. Cover with the remaining Cool Whip.
I like to take the crumbs and some of the broken wafers left in the bag and crumble them to make a pretty topping to sprinkle on top.
Refrigerate for at least 3 hours to set.