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225 x 130 x 15mm., A frame containing magnetic powder in a water-based solution. Displays magnetic field patterns Includes 2 ferrite block magnets and a pair of plastic-cased bar magnets Comes with an activity guide, A frame containing magnetic powder in a water-based solution. In a magnet's presence, the particles of iron become slightly magnetised so they attract each other and cluster into lines showing magnetic field patterns. Includes a pair of small ferrite block magnets, a pair of plastic-cased bar magnets and an activity guide. 225 x 130 x 15mm.
