Fizzing Chalk Activity

Fizzing Sidewalk Chalk! 

Let's get our science on! 

This task will test your science knowledge plus keep the kids busy for 30-45 min as they create their own experiment. 

 

Here is what you need: 

  • 2 cups Baking soda
  • A couple drops Food colouring
  • 1 cup Cornflour
  • ¼ cup Water
  • ¼ cup Vinegar
  • 1 Spray bottle (for the vinegar)

 

Make sure to find a good area to test this out (a concrete area is best!)

 

Method to make the paint:

  1. Mix together the baking soda and cornflour/cornflour.
  2. Add a small amount of water and stir together. Continue to add water until the consistency is close to finger paint.
  3. Divide the mixture between 4-5 bowls(you can also use a muffin tin as pictured).
  4. Add food colouringto create different vibrant colours; stir to combine.

Activity instructions:

  1. Make the sidewalk paint
  2. Create designs using the paint, may need to occasionally stir the paint as the cornflourmay settle atthe bottom of the bowl.
  3. To activate the fizzing paint, fill one spray bottle with the vinegar and spray onto the paint.
  4. Watch the paintings fizz!