Block Builder 3D — a build-to-match challenge in real 3D

This week epotli got its first game in real 3D.

Block Builder 3D is a build-to-match challenge across 12 hand-designed shapes — a tower, a tree, a rocket, a puppy, a little house, a castle turret. A glowing hologram marks out the shape to build, and your child taps the grid to stack textured blocks — grass, stone, wood, brick, glass, ice — that snap together like magnets. The part that makes it 3D: they can drag anywhere to spin the whole world and check every side, so a shape that looks finished from the front might still be missing a block round the back.

Nothing is ever blocked, and there is no fail. A wrong block just gets a gentle amber outline — the same soft "try again" you'll find across every epotli game — never a red mark. It's a Minecraft-style builder sized for the 5-to-7s who aren't quite ready for the real thing.

The skill underneath is mental rotation — holding a shape in your head and turning it to see the hidden sides. A good way to help is to ask your child to spin their build and describe what's behind, before they check. Putting the hidden side into words is the bit that usually gets skipped.

If your child takes to it, Block Builder is the open-ended, no-levels version for pure creative play, and Tangram works the same shape-fitting muscle in two dimensions.

---

Corrected 2026-09-14. This post originally said the hologram "shows exactly what to build". That was wrong on the day it was published: on levels 7-12 the hologram is a single translucent colour and hides the block types, which is why those levels carry a hold-to-peek button. The levels shipped that way at launch (0a3b5e2), so this is a correction, not a change in the game. The second edit softens an unsourced claim about where spatial thinking forms.