9-Piece Material Density Cube Set with Wooden Storage Box Entomology & Zoology_Zoology Models deflecting a pivoting cobalt-steel compass

deflecting a pivoting cobalt-steel compass needle inside a rectangular conductor frame to show that current generates a magnetic field

Alnico Grade III bar pair at 75 x 15mm with steel keepers in a cardboard box

exposing the moving parts so students see directly how a DC current drives a rotating magnetic field

75 inches tall with visible crankshaft

9-Piece Material Density Cube Set with Wooden Storage Box Entomology & Zoology_Zoology Models deflecting a pivoting cobalt-steel compassNine material 1 inch cube set spanning brass, iron, copper, aluminum, hardwood, softwood, nylon, PVC, and acrylic in a foam lined wooden case for density versus material investigations.