Colorful Pine Cones is one of the labs I have done at Science Camp. The kids soak pine cones in buckets of chemicals and remove them, and dry. These pine cones make great Christmas gifts. HST sells strontium chloride. Colorful pine cones are very similar to colorful birthday candles. Metallic salts change color when they are heated. (Here is an explanation. The electrons in the metallic salts get excited and emit a color as they resume a stable electron orbit.). Magical Flames are metallic salts. You can mix boric acid, Epsom salts, borax, Kosher salt, copper sulfate or these chemicals together to create your own colorful flames—no pine cones required. Bag up the mix of metallic salts as small gifts. Fun and quick! We mixed copper sulfate, sea salt, Epsom salt, and strontium chloride together as a present. We tried the mix in a beaker. The salts are meant to be tossed on a roaring fire—best outside in a fire pit. The last picture is an example of colorful flame candles.
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