Do you remember Magic Rocks? These were sold at dime stores and in the back of comic books. I remember buying a set at a Stuckey's on vacation to Florida one year. The toy I remember looks like the picture above. Here is a picture of an earlier Magic Rocks set: How they work: you get liquid sodium silicate and colorful rocks (actually metallic salts). You put the rocks in a pretty glass container, and then the sodium silicate (mixed with water), and the rocks grow. I googled and this simple…
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