We interrupt our alphabet food learning with a fun STEM activity for toddlers: Fizzy Cubes! 

This is a throwback to 2nd grade science class making volcanoes erupt with baking soda and vinegar. Except this time you get to watch things melt in a different way!

Fizzy Cubes Recipe


  • Ice Cube Tray
  • Squeeze bottle or syringe
  • Plastic Bin


  • 1/2 cup baking soda
  • 2 cups of water
  • Food coloring


Wash hands

20+ seconds. 

Water and soap. Just for good measure in case your kid puts these in his/her mouth!


Mix the water and baking soda

They aren’t the easiest to mix but try your best!

Water and baking soda mixture in pitcher

Add 5 drops of food coloring to each well

Practice counting! Liquid is better than gel. 

Photo of toddler coloring ice cubes

Put in the freezer and wait a few hours

Waiting is hard. 

Colored water in ice cube tray

Add vinegar to a squeeze bottle or syringe

Watch them fizz!

Finished fizzy cubes