Each group needs:

• 9 clear plastic 9 oz cups
• 1 permanent marker
• 1 ruler (cm units)
• 50 mL each of water, salt water solution, and sugar water solution (see below)
• 1 graduated cylinder or measuring cup (to measure 50 mL accurately, if not pre-poured)
• 4 gummy bears (select same color in a group)
• 1 gram scale
• 3-5 plastic spoons (to remove gummies from cups)
• 3 teacher-made gummy bears (one salt water, one sugar water, and one water)
• Gummy Bear Research Worksheet (1 per student)
• Gummy Prototype Investigation Worksheet (1 per student)
• Control and Prototype Data Analysis Worksheet (1 per student)
• paper towels (for spills and cleanup)

For the entire class to share:

• 1 laptop or tablet with access to the internet and projector (for YouTube videos and the What? How? Presentation)
• 3 1 L pitchers with:
• 1 L water1 L salt solution (see below)
• 1 L sugar solution (see below)

For the teacher:

To make salt and sugar solutions:

• access to the Solution and Gummy Bear Recipes
• 1 hotplate
• 1 stirring rod or spoon
• 2,000 mL distilled or tap water
• 35 g table salt (NaCl)
• 250 g sugar
• 2 1,000 mL beakers or heat-safe containers
• safety goggles and heat-resistant gloves

To make the gummy prototypes:

• access to the Solution and Gummy Bear Recipes
• 3 silicone molds such as mini ice cube trays, pop it fidgets, or gummy bear molds with at least 30 cavities each (use same size for all gummy prototypes to reduce variability)
• 9 oz total, 3 oz each of 3 different flavored gelatin mixes (1 flavor/color per batch
• 1.5 oz total, 0.25 oz each packet, of unflavored powder (6 envelopes at 0.25 oz each; use 1.5 envelopes per batch)
• 1/3 cup each of water, salt solution, and sugar solution