Mudwatt Classic Kit, Right or Left Handed: Fits Either Hand, track the growth of your electric bacteria colony with the blinker circuit and MudWatt Explorer App
Light source in metal housing on magnetic foil for experiments demonstrating ray optics on a whiteboard.With the help of rotating mirrors, the beams can be masked out individually. Lamp: 12V, 55W; Cord: 1.5 m w/ 4 mm plug
Mystery Density Activity Set with wooden holder, which allows for efficient storage and easy access, Set of 12 bars of different length but the same diameter