1.
Grind the edges and corners of the wooden plate, then apply a waterproof varnish.

2.
Fix the double folded latex to the left and right of the upper third part of the wooden plate using short furniture nails. Stretch the lower part of the latex until an arc is visible on the front side. Apply this procedure to the second half of the latex.

3.
Remove the overhanging latex parts with scissors.

4.
Attach an additional back plate (cover plate) with short screws and affix a picture fastener to it.

5.
Hang up the latex bag. Pull the two halves of the bag apart and insert objects of your choice.