Seed it with a pinch of phenyl salicylate and watch as the liquid cools, and the crystals begin to form. The process can be repeated many times with the same petri dish. Simply warm it again until the crystals disappear, and repeat the process. Orally review the concepts taught. Additional Activities Children can grow their own crystals and record their observations.
Children can compare the growth rates of various crystals, and graph their results.
Children can investigate the effects of light on various crystals. Children can investigate the properties of a variety of crystals. Additional References Brown and Forsyth, The Crystal Structure of Solids , Crane and Russak, N.Y. 1973. Holden and Singer, Crystals and Crystal Growing , Anchor Books, Doubleday and Co. 1960.