Simple Switch Demonstrator with 4mm Terminals Capacity_25mL Hand-driven Newton's color disc that

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

Millimeter-graphed 100 x 75mm screen on a 2

chloroplast

this plant cell model shows organelle ultrastructure and cell-wall layering for upper-level cell biology teaching

one fitted with an exploder piston for momentum and action-reaction investigations

Simple Switch Demonstrator with 4mm Terminals Capacity_25mL Hand-driven Newton's color disc thatSingle open or closed switch on a 4mm terminal base, providing the cleanest hand operated way to make and break a circuit during early electricity instruction with stackable modules.