A surprisingly stable, foldable laptop stand designed using Fusion 360. I included 2 side bracket designs: One suitable for Mac Pro or Air and one for laptops up to 16 mm thick (ex lid).
Fusion users can use the included .f3d to adjust as needed; they may want to 'flatten' the design to avoid the use of support.

The sides and back snap together at the hinges, which have been tested by my 3yo nephew.

I noticed that I could have saved myself some effort by downloading thingy 1330829 by Thmsdc.... (https://www.thingiverse.com/thing:1330829)

Creality

Ender 3 Pro

No

Yes

200

20

The supports may not be the easiest to remove at the slots' corners. Sorry for that - this was my first build.