Soma Cube — Build the Shapes Free in 3D 6+
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The soma cube is free to play right here in the browser — you do not have to buy the wooden puzzle to try it, and there is nothing to install. Seven pieces made of little cubes, twenty-seven cubes in all, and a glass outline waiting to be filled.
64 levels grow the way the hands do: first flat shapes from two or three pieces, then solid builds from four or five, then the full 3×3×3 cube — which has 240 different solutions, so no single answer can be memorised — and finally the named figures: the tower, the steps, the chair, the dog, the plane. Pieces are turned and flipped with a finger, and a piece that does not fit says so quietly instead of buzzing.
How to play
- Look at the glass outline — that is the shape to fill.
- Drag a piece up from the tray onto the board.
- Tap a piece to turn it, swipe it up to flip it over.
- Spin the table with your finger to see the far side.
- Tap the eye when a piece hides inside the shape and you need to see through it.
What your child learns
- Mental rotation — turning a shape in your head before your hand moves
- Reading a solid body from a flat picture
- Volume by counting: 27 cubes, seven pieces, no gaps left
- Trying, backing out and trying another way without giving up
- Direct groundwork for school geometry
The science behind the games
Every Dad4Kids game is built on one simple truth: children want to play, not study — so we turn learning into a game worth replaying. The method draws on peer-reviewed research in game-based learning, motivation, and how memory works.
- Prins et al. (2013). “Braingame Brian”: toward an executive function training program with game elements. Games for Health Journal.
- Tokac et al. (2019). Effects of game-based learning on students' mathematics achievement: A meta-analysis. Journal of Computer Assisted Learning.
- Alotaibi (2024). Game-based learning in early childhood education: a systematic review and meta-analysis. Frontiers in Psychology.
- Lampropoulos & Sidiropoulos (2024). Impact of gamification on students' learning outcomes and academic performance: a meta-analysis. Education Sciences.
- Taylor & Boyer (2019). Play-based learning: evidence-based research to improve children's learning experiences. Early Childhood Education Journal.
- Gottfried (1990). Academic intrinsic motivation in young elementary school children. Journal of Educational Psychology.
FAQ
Do I need to buy a wooden soma cube?
No. The puzzle is playable free in the browser on a phone, tablet or computer — nothing to order, no registration, no downloads.
What are the seven pieces made of?
Six pieces of four cubes each and one of three — 27 cubes in total, which is exactly a 3×3×3 cube. That is why the whole set always fits, if you find the right way.
How many solutions does the cube have?
240 different ones, not counting rotations. A child cannot learn one answer by heart and repeat it — every attempt is real thinking.
What age is it for?
From 6. The first levels are flat shapes from two or three pieces, so the hands learn to turn and place before the puzzle becomes three-dimensional.
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By Evgeny Arsentiev, PhD · Last updated: September 2026