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Color Changing Edible Slime

There are multiple ways to make this incredible edible slime, although calling it tastable slime may be a better description since it's definitely not a snacktivity. We've got a recipe for basic chia seed slime (option 1), thicker opaque chia seed slime (option 2), and our personal favorite color changing chia seed slime (option 3). I’m not gonna lie, this activity is a messy one, but the sensory fun that was had was so worth it.


Supplies & Instruction

2.5 tablespoon chia seed

2/3 cups water

Bowl

Food coloring (option 1 or 2)

1-1.5 cups corn starch (option 2)

2 teaspoons butterfly pea flower tea (option 3)

Lemon juice (option 3)

Baking soda (optional for option 3)


Slime Option 1: Basic Chia Seed Slime

Mix chia seed, water, and food coloring in a bowl and refrigerate over night. This slime is more just slimy and has a great texture. Use this version to practice writing letters by pouring into a ziploc bag.


Slime Option 2: Thicker Opaque Chia Seed Slime

Mix chia seed, water, and food coloring in a bowl and refrigerate over night. The next day, slowly and in small increments, mix in the corn starch. This slime is similar to slime and will stretch.


Preschool Prompts

Describe the slime using your sense of touch, smell, sight, and taste. What do you think will happen if you add slime 2 to slime 1? Describe the difference between the two types of slimes. Do these remind you of anything? What do you think will happen if you add water to the slimes (only done at the end as part of cleanup)?


Slime Option 3: Color Changing Chia Seed Slime

Prepare butterfly pea flower tea in a bowl by steeping with 2/3 cups boiling water. Add chia seed, mix, and refrigerate over night. The next day, add lemon juice in small increments to watch as the slime changes from blue to purple. Additionally, you can add baking soda to turn the slime back to blue. A video tutorial of how to prepare the color changing slime can be found on our Instagram page @tinyn3rds.


Tip: use a clear bowl rather than an opaque bowl to see the color change more clearly.


How it Works

Butterfly pea flower gets its blue color from anthocyanins. Because anthocyanins' color changes with pH, they can sometimes be used as a measure of whether a solution is acidic or basic (also known as a pH indicator). Butterfly pea flower is blue when it is basic, and purple to bright pink when it is acidic.


Preschool Prompts

Describe the slime using your sense of touch, smell, sight, and taste. What color is the slime? Is lemon juice acidic or basic? What do you think will happen when you add lemon juice to the chia seed slime? What color does the slime turn once you add a lot of lemon juice? If purple indicated the slime is acidic, what color indicates it is basic? How could we turn the slime back to blue?


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