Each group needs:

• half-pint Mason jar
• 150 ml water
• ~ 2 pounds sugar
• 1 additive; give each group a different additive and one group no additive; such as liquid food coloring (a few drops), salt, Kool-Aid powder (2-3 packets), brown sugar, powdered sugar, milk, apple juice, liquid cinnamon extract, JELL-O powder (one box is enough for 3 groups)
• 6-inch dowel rod; such as 3/16 inch x 36 inch (~0.5 cm x 90 cm) hardwood dowel for 30¢ each at hobbylobby.com, each rod is enough for 6 groups; alternatives: wooden skewer or chopstick
• clothespin
• hot plate (borrow from a chemistry lab or purchase at sears.com for $20 each)
• glass stir rod
• 500-ml or larger glass beaker
• Rock Candy Worksheet
• Rock Candy Procedure Handout

To share with the entire class:

• digital scale, to measure in grams
• graduated cylinder, to measure water
• heat-resistant gloves, one pair per group or share a few pairs among groups
• safety glasses
• aluminum foil, to cover the hot plates
• permanent marker and masking tape, to label jars
• computers, tablets or iPads with Internet access, for research
• water, soap, paper towels, sink and drain