A thought provoker and primer for noobs still trying to get their heads around 3D.
Shows orientation of outer corner of the axis to the 0,0,0 point and the placement of a block at the 2,2,0 location. Hole for something skinny is the bonus.
See other versions below, on Orchard and maybe help create versions of these so that people can start to learn faster. It's only 4X5cm and 4cm tall. The grid is split on the edges so it can be joined for presenting negative grid locations.
The axis piece comes off easily but use support, no raft, small brim.
https://3dorchard.com/app/single/5879a0e269a7a70bad75d169/5ae8b3406048350c1544dda7

Ultimaker

Ultimaker 2

No

Yes

1.5

20

3D programs scare people.
Help kids comprehend virtual 3D space - represented by physical models.

So many buttons and ways to do things and starting with the fundamentals is crucial to activating the spacial thought processes. I am glad to discuss any other step by step ideas for 3D printable learning aids so our kids can be up to speed.

Took about 35 Min to print