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In year two, young scientists often study the changes in states of matter. This is a big deal for this stage, when children tend to think in the most literal, concrete terms. If frozen water solidifies, is it still water? Here’s a powerful science experiment that also happens to be fine cuisine—perfect for a first grader who enjoys the kitchen. Use simple equipment to turn egg whites into a delicacy: fancy meringues. In the process, find out how, with just a few interventions, those wet, gooey egg whites can transform before your eyes.