Spatial
Drag or tap to turn
Mental rotation
Turn a 3D shape in your mind. Is it the same, or a mirror image?
3D shapes · Adjustable difficulty
Try a practice
Spatial
Explore layers
Cube counting
Count hidden supporting cubes, or work out how many remain after removing a layer or column.
6–57 cubes · 8 levels · No time limit
Spatial
Mirror images
Find the reflected shape among rotations and close copies.
6–9 squares · 8 levels · No time limit
Spatial
Hidden figures
Find a small figure hidden among extra lines.
5 choices · 8 levels · Untimed
Spatial
Angle ranking
Put four angles in order from smallest to largest, then align them to compare.
5 questions · 3 levels · Untimed
Spatial
Fold the net
Cube Nets
Find opposite faces or match a cube. In Match the cube, level 9 adds mark orientation.
Cube nets · Untimed
Spatial
Compare views
Cube views
Read cube views, find a missing view, or choose a clue that distinguishes two stacks.
Stacked cubes · Untimed
Spatial
Follow the route
Spatial orientation
Track your facing direction and position through turns and moves.
8 questions · 3 modes · Untimed
Spatial
Roll the cube
Rolling cubes
Follow a marked cube along a route and find its final top or front face.
6 questions · 3 levels · No time limit
Spatial
MapYour viewpoint
Change viewpoint
Perspective taking
Imagine standing at one point and facing another. Find a third point from your new viewpoint.
6 questions · 3 levels · No time limit
Spatial
Turn the gears
Gears
Follow a gear train to find the last gear’s direction and speed.
6 questions · 3 levels · No time limit
Spatial
Drag or tap to turn
Cross sections
Predict the cut shape of a block, prism or pyramid, then inspect the exact section.
6 questions · 3 levels · Untimed
Spatial
Shape assembly
Fit separate pieces into one shape, then inspect how they join.
6 questions · 3 levels · Untimed
Spatial
Match the opening
Turn a stepped solid to fit an opening, then check its full outline.
6 questions · 3 levels · Untimed
Spatial
Paper folding puzzles
Follow folds, punches and edge cuts, then choose the fully opened sheet.
6 questions · 3 formats · Explanations
Spatial
Cube moves
Apply a short sequence in standard cube notation and pick the cube that results.
6 questions · 3 levels · No time limit
Spatial
Turn the cube
Turn a 2x2 or 3x3 cube with your hands, then undo the short scramble it just played.
6 puzzles · 2x2 or 3x3 · 1 to 4 moves back · Free play
Spatial
Jigsaw puzzles
Put a picture back together. Twelve pictures, from 12 to 96 pieces, at your own pace.
12 pictures · 12 to 96 pieces · No time limit
Spatial
Turn the pyramid
Turn a four sided pyramid puzzle with your hands until every face is one color, in as few turns as you can.
6 puzzles · 3 levels · Fewest turns · Free play
Spatial
Knight's tour
Move a knight so that it lands on every square of the board exactly once.
1 board · 3 sizes · Hint · Undo
Spatial
Tangram
Fill an outline with the seven classic tangram pieces. Turn them by 45 degrees, flip the parallelogram, and use every piece once.
1 figure · 3 levels · 52 figures · Hint
Spatial
Build from two views
Build a stack of cubes that matches a front view and a right view.
5 puzzles · 3 levels · Hint · Undo
Spatial
Pack the cube
Turn solid pieces and fit them into a cube without gaps or overlaps. Three untimed spatial puzzles, with a movable 3D view and optional hints.
3 puzzles · 3 levels · Untimed
Spatial
Construction from parts
Place and turn pieces to build a target shape without overlaps.
3 puzzles · 8 levels · Tap to build
Spatial
Mirror paths
Turn mirrors to guide a beam through its checkpoints and into the target.
1 puzzle · 3 levels · Untimed
Spatial
Plan the errands route
Visit the right places in a useful order. Adapt to closures and opening times.
3 levels · Guided practice
Learn a method
Browse lessonsFollow a rolling cube
Track the faces one quarter-turn at a time, even when the path changes direction.
Goes with Rolling cubes
Use your viewpoint
Face a landmark in your imagination, then locate another using your own left and right.
Goes with Perspective taking
Follow a gear train
Use gear ratios, shared shafts and direction changes to solve simple and compound gear trains.
Goes with Gears
Read cube notation
Learn the six face letters, and what a prime mark and a 2 change.
Goes with Cube moves
Track a strip through several turns
Follow three known stickers through a scrambled cube, updating their position and order after each turn.
Goes with Cube moves
Set a frame for an angled viewpoint
Find your own front and right when the facing arrow falls between compass directions.
Goes with Perspective taking
Turn a shape, don’t flip it
Follow an uneven shape through a turn and a reflection.
Goes with Mental rotation
Compare angle openings
Look past direction and arm length to compare how far two lines open.
Goes with Angle ranking
Count cubes by layers
Split a supported stack into horizontal layers and count each cube once.
Goes with Cube counting
Unfold in reverse order
Undo the last fold first and mirror each hole across the crease you open.
Goes with Paper folding puzzles
Read top and front views
Separate a stack’s footprint from its height seen from the front.
Goes with Cube views
Trace a hidden shape
Follow connected edges to find a shape among crossing lines.
Goes with Hidden figures
Cut a solid
Find the flat shape where a plane cuts through a cube or rectangular block.
Goes with Cross sections
Fit pieces together
Rotate pieces and check whether they can fill an outline without gaps or overlap.
Goes with Shape assembly
Project the whole solid
Combine every depth layer before choosing an opening.
Goes with Match the opening
Count cubes by painted faces
Use corners, edges, face centers and the interior to count without overlap.
Goes with Painted faces
Find a missing view
Use the top and front views of stacked cubes to find the view from the right.
Goes with Cube views
Track your direction
Separate where you are from the direction you face, then follow each turn.
Goes with Spatial orientation
Match a marked cube
Use opposite faces and the order of marks around a corner to match a net to its cube.
Goes with Cube Nets
Undo a turn
Learn how to put a cube back after one turn, and after a short run of them.
Goes with Turn the cube
Jigsaw edges first
Sort a jigsaw by straight edges, then by color, then by the shape of the tabs.
Goes with Jigsaw puzzles
Turn a corner
Learn what one corner turn of the pyramid puzzle moves, and why the tips can wait.
Goes with Turn the pyramid
Fit pieces to the outline
Use edges and corners to place every piece without gaps or overlaps.
Goes with Construction from parts
Edges first for the knight
Learn why a knight visits the squares near the edge early, and how one rule from 1823 picks the next move.
Goes with Knight's tour
Big triangles first
Use the areas of the tangram pieces and the outline’s corners to choose a useful starting point.
Goes with Tangram
Build to match two views
Read the front view for each column and the right view for each row, then fill in the rest. See how few and how many cubes can cast the same two views.
Goes with Build from two views
Follow the mark
Keep each mark on its face and follow its direction as a net folds into a cube.
Goes with Cube Nets
Count exposed faces in a stack
Check each cube’s neighbours, exclude the ground, and count cubes with the requested number of painted faces.
Goes with Exposed faces
Unfold through overlapping layers
Reverse diagonal and straight folds while checking which paper layers actually lie beneath a punch.
Goes with Paper folding puzzles
Count overlapping removals
Count regions A and B, then subtract their shared cubes only once. The stack does not fall or settle.
Goes with Cube counting
Unfold unequal folds and edge cuts
Only paper beneath a punch or cut is affected. Open the folds in reverse. Cut pieces that meet across a crease join into one opening.
Goes with Paper folding puzzles
Choose the extra clue
Two solids match the given views. Choose one observation that tells them apart.
Goes with Cube views
Move the cutting plane
Keep the plane at the same angle and predict its section at the new position.
Goes with Cross sections
Turn before passing
Turn the solid to the named approach, then choose its opening.
Goes with Match the opening
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