Played some more with voxels (inspired by @Moranart's bedroom), I was testing different (local) light sources in very dark environment. Attaching also the source file.
Thanks to @Jinsu I started to play with MagicaVoxel
(Minecraft for designers).
Tried to create a simple environment inspired by @Mohamed Chahin (much better looking) polygons.
Attaching also the source file.
My wife is a 4th grade teacher and was preparing some math posters for her class, so I helped her a bit over the weekend. Hope I didn't make it worse 0:)
If you know any teachers who would find this useful, feel free to grab and share.