2. Cut two pieces of duct tape in a length long enough to cover the triangle. 3. Lay the open side of the triangle on the edge of the sticky side of the tape. 4.

Supplies You’ll Need: Duct Tape Envelopes Scissors Instructions: 1. Cut a corner/corners off your paper envelope. 2. Cut two pieces of duct tape in a length long enough to cover the triangle. 3.