Model Categories

Model Categories

We have models in several categories, including Locks, Engines, Cars and Car Components, and Clocks. Please browse our selection below and click on any model for full details, including videos.

Locks

These models demonstrate the two most common forms of lock mechanism: pin-tumbler, and combination. Each style is available either as a pure demonstration model, or with the lock built into a semi-useful object that demonstrates how it can be applied.

Pin Tumbler Lock

Pin Tumbler Lock

Gift Card Lock Box

Gift Card Lock Box

Combination Lock

Combination Lock

Safe

Safe

Lock Set

Lock Set

Complete Lock Set

Complete Lock Set

Engines

These two-dimensional models demonstrate the key features of steam engines and a radial internal combustion engine. By turning them slowly through their cycles you can see the role of timing in the operation of the engine.

Radial Engine

Radial Engine

Two-Eccentrics Steam Engine

Two-Eccentrics Steam Engine

Folded Steam Engine

Folded Steam Engine

Right-Angle Steam Engine

Right-Angle Steam Engine

One-Crank Steam Engine

One-Crank Steam Engine

Corliss Steam Engine

Corliss Steam Engine

Piston and Flywheel

Piston and Flywheel

Steam Set

Steam Set

Complete Steam Set

Complete Steam Set

Car and Car Components

These models show, in transparent 3D form, the key ideas behind the major mechanical components in an internal combustion engine car. All the parts work, including the steering wheel, gear shift, and differential. Electric motors can be added to make the models run on their own.

Radial Engine Car

Radial Engine Car

Two-Speed Transmission

Two-Speed Transmission

Two-Speed Transaxle

Two-Speed Transaxle

Differential

Differential

Rack-and-Pinion Steering

Rack-and-Pinion Steering

 

Clocks

These kits include a fully functional battery-powered clock that tells time, and several variations of gear chains that do not run on their own, but are fun to spin by hand to learn about how compound gear chains can speed up or slow down rotational motion.

Pendulum Clock

Pendulum Clock

Electric Clock

Electric Clock

Two-Stage Clock Gear Chain

Two-Stage Clock Gear Chain

Three-Stage Clock Gear Chain

Three-Stage Clock Gear Chain

Mathematical Models

Pythagorean Theorem Proof

Pythagorean Theorem Proof

Golden Ratio Proof

Golden Ratio Proof

Pi Proof

Pi Proof

Math Set

Math Set

 
 

Sets

Lock Set

Lock Set

Complete Lock Set

Complete Lock Set

Math Set

Math Set

Steam Set

Steam Set

Complete Steam Set

Complete Steam Set

 
Ultra Mega Set

Ultra Mega Set