HOW TO CREATE A GoPro COSTUME: - Step 1) Find a Box and some cardboards to realize the details. If your box is not rigid enough, reinfoce it adding some triangular cardboard in each angle. I used plenty of hot glue.
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Step 5) Color the back of the box with black and add the GoPro label.
Step 4) Glue together several layers of cardboard to create a thick sheet for the photographic lens. Following this draw all the details to make it more realistic.