Mix 8 oz whipped topping, pudding and crushed cookies until well mixed.

Divide in half and add red food coloring to one and blue to the other half.

On a tray small enough to fit in the freezer, stack 4 ice cream sandwiches.

Top with blue topping making sure not to go over outer edges.

Top with 4 more sandwiches.

Top with red topping making sure not to go over outer edges.

Top with 4 more sandwiches.

Cover and ice with other container of whipped topping.

Place in freezer for at least 2 hours.

Slice and serve.