PrintABloks are good for more than just toys. You can use them to make useful things, too. Like a custom shelf for holding small things using a screw adaptor.
This simple build showcases the functionality of PrintABloks.
PrintABlok are interlocking building toys created by the 3D Printing Professor, designed to work well on home 3D Printers. PrintABloks can be built in all 6 directions, allowing for gravity defying building unlike any other building block out there.
If you are interested in getting a greater variety of blocks, including articulated blocks and decorative elements to make cool builds, you can check out premium sets here:
Print out P900 Shelf 1.stl twice, P900 Shelf 2.stl once, the 140_8x12_Panel.stl and as many connectors as you'll need (probably about 36 of them) and assemble according to the assembly instructions. Then mount on your wall with screws in the screw holes.