Rock Candy Science Experiment

It's been a long, long while since I've eaten rock candy, but the kids and I made some last week as part of our science studies. It's easier to make than you might think!

You'll Need: 
Clean wooden skewer (for each piece of rock candy)
A clothespin (for each)
A clean glass jar (for each)
Water
Sugar
Pan


The Process:

Boil water in a pan. Add food coloring if desired. Once the water is boiling, encourage each child write a hypothesis about how much sugar will dissolve in the water. Be sure to keep track of how much sugar you are adding to validate these hypotheses!

Add 1/4 of sugar at a time until no more sugar will dissolve in the water. Remove the mixture from the heat and cool for 20 minutes.

Dip each skewer into the mixture and roll it in sugar. Set the skewers aside and let it cool completely. (Investigate why rolling in the skewers makes the sugars grow faster!)

Pour the sugar water into each jar until the jar is at least 3/4 full.

Place one skewer in each jar with the sugar-coated side downward. The end of the skewer should be approximately an inch above the bottom of the glass. Use a clothespin to hold the skewer in place over the jar. Allow it to cool and wait 3 - 7 days for the sugar crystals to grow.