This was a thought exercise in making super flexible mechanical hinge grid. This is not really useful in the current state.
I got this idea in my head and decided to print it out to see how it would go.

This is does do

• demonstrates Full range of motion in on 4 points
• uses pure mechanical hinges and ball joints to achieve a very flexible thing :)

The known issues

• the connection bars are very fragile and can break
• resizing the grid requires hard coded values
• resizing the nodes requires a ton of readjustment
• not parametric
• overly tight tolerances

I don't plan to make this parametric ( there are patterns i'm just too lazy to figure them out)

All in all, the idea does (sort of) work but i don't see any use for it.

Maybe one of you can come up with an application for this.

Update: I did not know about this design before. This guy had the main idea first! https://www.thingiverse.com/thing:422564 Mine is an offshot from the same idea. Give credit where credit is due and more links!!