Cannon Blaster Costume

My son Shane is wearing an arm Cannon Blaster. We made it out of a large plastic water bottle at 99 cent store. I cut the top off & hot glued scrap foam board to make the details. Painted it with acrylic paint & added strips of reflective tape for safety. Also glued a cut up straw inside of bottle for him to hold onto to keep bottle on his arm. We also added a clickable bike light we had inside to shine through the bottle end. Very easy to make!