Rock candy is like a magic crystal that you can eat! It starts with sugar, which is a tiny, tiny powder that you probably have in your kitchen.
First, grown-ups mix the sugar with hot water to make a sweet, syrupy liquid. They might also add some flavors, like strawberry or lemon, to make it taste even better.
Next, they pour the liquid into a jar, and they put a stick or a string in it, with the top of the stick or string sticking out of the jar.
Then they wait, and wait, and wait. As the syrupy liquid cools off, the sugar will start to group together into tiny crystals around the stick or string. And over time, those tiny crystals will get bigger and bigger, until they form a big, beautiful crystal!
Finally, after a few days, the grown-ups take out the stick or string and let the crystal dry off. And there you have it - a delicious, sugary, sparkly treat that you can crunch like a rock!