Thinking Fountain image (17k)Thinking Fountain text (10k)

Indicator Art

This is a creative way to introduce acids and bases. -Chris


  • 237 mL (1 cup) grape juice
  • 118 mL (1/2 cup) vinegar
  • 237 mL (1 cup) of water
  • 30 mL (2 tbl) baking soda
  • paintbrush
  • 3 plastic cups
  • white construction paper
Grape juice paper (11k)

Paint the paper with grape juice and let it dry - do this several times.

Indicator art (11k)

Mix baking soda and water - paint a design on the paper.

That makes me think . . . (11k)
What if you did this activity backwards? What else could work like the grape juice? Try painting with other liquids or solutions.

Yellow dot (9k) Now for a soapy suprise

Yellow dot (9k) Indicator ants

Yellow dot (9k) Secret messages

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Mind maps (9k)
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Index of ideas

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