Combine prepared pudding mixes. For single servings: Place a spoonful of pudding into dessert cups/bowls. Line the sides of each cup/bowl with cookies. Place a layer of banana slices over pudding. Spoon in more pudding, and add another layer of banana slices.
Repeat pudding/banana layers until cups/bowls are about 3/4 full, ending with pudding. Garnish with a cookie and leftover banana slices.
Can also be made in a large serving bowl ... following the same steps as above, and adding a layer of cookies in with the banana & pudding layers.