Rectangular Refraction Cell, Material: acrylic rectangular, Color: clear, excellent for showing refraction and internal reflection in water, and to measure its refractive index, has uniform wall thickness to eliminate distortions, Dimension: 6X3X6.2 CM
KidWind Sound and Light Board, simple power output board that comes standard with the MINI Wind Turbine, great way to demonstrate power output from small electrical devices, needs at least 2 V to start working