12-Piece Density Metals Variety Set with Assorted Shapes Material_PVC and engraved index line for

and engraved index line for reference alignment

transmitting light end-to-end via total internal reflection to give a tabletop analogue of a fiber-optic cable

Length-adjustable wooden pendulum simple-machine model with a blue bob sliding along the string and a wooden guide keeping the swing on a consistent path for period-vs-length measurements

Built to reveal stress fringes in transparent solids

Dial-selectable multi-tap battery eliminator delivering 1

12-Piece Density Metals Variety Set with Assorted Shapes Material_PVC and engraved index line forAssorted shape density kit with 12 specimens across brass, iron, aluminum, copper, zinc, and lead, each 12 25g, giving students shape variation on top of the material density comparison.