Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets sized for energy-storage demonstrations where

sized for energy-storage demonstrations where stored joules need to discharge through a visible load

this regulated low-voltage DC power pack outputs a fixed +12V through front-panel terminals on the benchtop

the wider-range Wheatstone-bridge reference

Five-piece giant wooden clothespin set sized at 7

demonstrating mechanical advantage as the angle of incline changes the effort needed to roll the cart up the slope

Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets sized for energy-storage demonstrations whereWooden frame abacus on a 13. 5 by 9. 5 inch finished base, six steel wires carrying 20 beads each for hands on instruction in counting, place value, and basic arithmetic.