Things You'll Need
Instructions
Cut a four-inch diagonal line into each of the four corners of the carboard.
Fold each side of the carboard creasing at the end of the cut made in Step 1, and release. This will create the look of a pre-fabricated box.
Pick one corner to begin and criss cross the pieces so that one is laying on top of the other creating a corner. This will be repeated for all four corners.
Tape the outside of the corner so that it stays together without being held. Repeat this step for all corners.
Tape the inside of each corner vertically without taping into the corners - imagine making a slide - using three strips of tape. Taping the corners vertically gives your arena the bowl-like curves that allow Beyblades to spin up and onto the sides. Repeat this step for each corner.
Continue taping the inside of the arena to eliminate any uneven areas that aren't taped. Completely cover the inside in duct tape so that the surface is as even as possible.