Take machines apart, piece by piece

Every puzzle hands you the cutaway pieces and asks you to put them back — engines, pumps and appliances rebuilt from scratch.

Assemble a Four-Stroke Engine

Drag the pistons, valves and crankshaft into the right places.

Assemble an Espresso Machine

Build the water path from tank to group head without a leak.

Pump Valve Assembly Puzzle

Fit the parts of a pump and valve loop in the correct order.

Cutaway Puzzle: Rebuild a Turbofan Engine

Stack the internal layers back together from a cutaway view.

Valve Trim Diagnosis Game

Find out why the check valve leaks by inspecting its internals.

Heat Exchanger Plate Stacking Puzzle

Order the plates and gaskets so the two flows never mix.