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Description

Make edible sugar crystals.
PDF File with Instructions

Resources

3 cups sugar (sucrose)
1 cup boiling water
food colouring (optional)
flavouring (optional — good choices include cherry, peppermint, and cinnamo)
clean glass or plastic jar
wooden skewer or cotton string

Instructions

Dissolve the sugar in the boiling water. Slowly add sugar until it stops dissolving. This is called saturation. You can heat the sugar solution on the stove or in the microwave if you have trouble getting the sugar to dissolve.
Add a few drops of food colouring and/or flavour, if desired.
Allow the solution to cool a bit before pouring it into your jar. You don’t want to get burned!
Make the end of the string or stick wet and dip the end in sugar so it’s coated, this will encourage the sugar to stick. Place the wooden skewer into the jar or else hang a string into the middle of the jar, tied to a pencil or butter knife.
Place the container somewhere it won’t be disturbed. You may wish to cover the jar with a paper towel or coffee filter to allow evaporation while keeping the crystal solution clean.
It may take a few days to get good crystal growth. If you see crystals forming on the top of the jar, you can remove them and eat them. If you leave them, these crystals will compete with your stick or string for sugar and will reduce the size of your crystals.
Remove the crystals and enjoy them! If you want to store the crystals before eating them, keep them in an airtight container so humidity in the air won’t make the rock candy sticky.

Tags

• edible craft
• experiment
• scientist
• Sugar
• the great indoors

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• Scientist - Experiment