Solki: Cube Builder Kids

Three shadows, one solid. Your child builds a shape that matches all three views at once - and learns to see in 3D. 168 hand-made levels. No ads, no data, no reading.

Solki turns three flat shadows into one solid shape - and your child is the one who builds it.

Three cards sit at the top of the screen: what the shape looks like from the front, from the side, and from above. The workbench below is empty. Tap a square, a cube drops onto it. Keep going until all three shadows match.

No text. No typing. No reading required.

WHAT YOUR CHILD LEARNS • Seeing in three dimensions - the skill behind maps, diagrams and drawing • Reading a plan and a side view, the way engineers and architects do • Holding two rules in mind at once, then three • Finding the cheapest answer, not just an answer

THREE WORLDS, ONE WORKBENCH Shadow (ages 4-6) - one card. Copy what you see. Two Eyes (ages 6-7) - two cards, then three. Now the views argue with each other. Hollow (ages 8-10) - cubes float. Dozens of shapes cast the same three shadows; find the one that uses the fewest cubes.

BUILT FOR SMALL HANDS Turn the workbench to see the hidden side. Every edge is colour-coded to its card, so nobody loses their bearings. Hold a cube to take it back. Nothing is ever lost, nothing is ever timed, and there is no way to fail.

HOW WE MADE THE LEVELS Every level is solved by a program before it reaches your child. That program proves the puzzle is possible, and works out the fewest cubes it can be built with - that number is the three-star target. No level was guessed at, and no star threshold was typed in by hand.

WHAT SOLKI WILL NEVER DO • No ads. Not now, not later. • No data collected. No analytics, no tracking, no accounts, no network code at all. • No permissions. Not the camera, microphone, location or notifications. • No subscription. One purchase unlocks every level, forever. • Works offline.

Made by one person who wanted his own children to have something quiet to think with.