Simple Switch Demonstrator with 4mm Terminals Capacity_25mL LPG Bunsen burner with an

LPG Bunsen burner with an anti-tip cast iron base and adjustable air flow

and ice-pail induction

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

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

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

Simple Switch Demonstrator with 4mm Terminals Capacity_25mL LPG Bunsen burner with anSingle 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.