This was a fun surprise for the boys! They had no idea what was under the baking soda.  I told them to squeeze some vinegar on the baking soda to see a surprise!  They have done many experiments with baking soda and vinegar adding the color as a surprise underneath was a fun change.  Thanks for the the idea @bubblesandbellylaughs

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Materials:
Baking Soda
Vinegar
Baby food jar or cup
Food Coloring
Mini muffin tin
Pipette

First put food coloring in the muffin tins. We did 5 drops in each.  Then cover the food coloring with baking soda.

       

Fill a baby food jar or cup with vinegar.  Then give your child a pipette and let them have fun playing!  What happens when you mix baking soda and vinegar? The boys were surprised to see the different colors! 

Check out more of our science activities here