Energy Tube, teaching resource for an array of scientific concepts: open and closed circuits, conductors vs. Insulators, light waves, sound waves,currents, and energy, When a conductor touches both of the electrodes on tube, tube emits a sound and flashing red/green/blue LED lights
great biology resource, Prepare your own slide specimens with this microscope slide making kit. The reusable glass slides can be used time and time again, providing excellent value. Includes 12 slides, 12 cover slips, and a storage box holding up to 25 slides