4-Stroke Diesel Hand-Crank Engine Model, 16" Pack Size_6 this metal helix lets stairwell-scale

this metal helix lets stairwell-scale wave-propagation experiments amplify the visibility of standing waves

Triple-parallel plastic pulley with three 50mm wheels on a steel frame with end hooks

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

5-inch diameter

4-Stroke Diesel Hand-Crank Engine Model, 16" Pack Size_6 this metal helix lets stairwell-scaleWalks students through four stroke diesel operation on a 16 inch hand cranked model, visible crankshaft, cam, injection pump, and 6V powered ignition light staging each step.