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Cube Unfold

Thumby built a cube out of paper. Only one of four flat nets folds into exactly the cube you see.

How to play

Look at the three faces you can see: top, front and right.
Fold each net in your head. Faces that touch on the cube must touch on the net, edge to edge.
From level 2 some marks point a way (arrows, bars): their direction must match too.
A right answer climbs a level; answering within 20 seconds adds a bonus.

8 cubes · exactly one net is right, checked by folding in code

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Cube Unfold

A paper cube is shown from one corner. Four flat nets sit below, and only one folds into exactly that cube. From level 2 some marks point a way, and their direction must match too.

8 cubes
Spatial reasoning

How to play

Look at the cube. You see three faces: top, front and right, each with a mark.
Fold in your head. Faces that touch on the cube must touch on the net. The printed side faces out.
Mind the arrows. From level 2 some marks point a way: arrows, triangles, bars. Their direction must match.
Climb. A right answer climbs a level; answering within 20 seconds adds a bonus.

Quick tips

Find the touching faces. The three faces you see share one corner. On the right net, those three cells must fold around one point.
Opposites never touch. In a straight row of three cells, the two ends end up on opposite faces.

3 more tips in the Cube Unfold guide →