Smithsonian Motor-Works

• Grades: 3–8
• Number of Students: 1–2 students per kit; pairs are recommended
• Number of Lessons: N/A — no fixed lesson count specified
• Hours of Content: Approximately 2–4 hours, estimated for assembly and exploration

Highlights:

Kick-start an interest in mechanical engineering with the Smithsonian Motor-Works Kit — a hands-on STEM activity that lets kids build a functioning model engine from the inside out. Following step-by-step instructions, young engineers assemble cylinders, pistons, gears, and ignition components to create motion just like a real internal combustion engine.

Once complete, flip the switch and watch the engine come to life as the pistons fire in sequence — with light effects that simulate spark plug ignition and a clear viewing chamber so kids can observe every moving part. Along the way, they learn how engines generate power, why timing matters, and how machines keep our world moving.

Perfect for science fairs, classroom demonstrations, homeschool lessons or simply weekend building fun, Motor-Works encourages confidence and curiosity through meaningful hands-on exploration. Smithsonian educational quality ensures a kit that both entertains and teaches lasting STEM concepts.

What’s Included:

• 2 Washers
• 2 Shafts in Various Lengths
• 4 Exhaust Valves
• 4 Intake Valves
• 8 Valve Stems
• 4 Piston Pins
• 8 Piston Halves
• 4 Connecting Rod Keepers
• 4 Connecting Rods
• 8 Timing Cams
• 8 Rocker Arms
• 1 Crankshaft
• 1 Crankshaft Pulley
• 1 Fan Pulley
• 1 Fan
• 1 Engine Mounting Stand
• 5 Bearings
• 1 Clutch Housing
• 1 Oil-Pan
• 1 Lower Crankcase
• 1 Rocker Arm Cover
• 1 Upper Cylinder Head
• 1 Timing Belt
• 1 Timing Wheel
• 1 Timing Gear
• 1 Belt Tensioning Pulley
• 1 Lower Cylinder Head
• 1 Cylinder Block
• 1 Dipstick
• 1 Positioning Jig
• 1 Timing Belt Cover
• 1 Intake Manifold
• 1 Exhaust Manifold
• 1 Carburetor Cover
• 1 Carburetor Bowl
• 1 Front Half of Water Pump
• 1 Rear Half of Water Pump
• 1 Flywheel Clutch
• 1 Fan Belt
• 1 Head Gasket
• 8 Valve Springs
• 1 Distributor Assembly
• 1 Drive Module
• 1 Battery Pack
• 67 Screws
• Color Poster with Instructions

Technology Requirements/Specifications:

• Dimensions: 38.1 x 7.6 x 29.8 cm (15 x 3 x 11.8 in)
• Weight: 0.93 kg (2.04 lb)

Special Notes and Considerations:

Requires 2 (1.5V) AA Batteries, 1 pair of scissors, and a screwdriver (Not included).

⚠WARNING: 

CHOKING HAZARD - Small parts. Not for children under 3 years.