Cleaning pennies with ketchup: easy and fun STEM for kids.
Want to wow your kids with some simple kitchen science? This is a fun and easy STEM activity that introduces the idea of oxidation and basic chemical reactions. All with pocket change actually. You are going to challenge your children to clean pennies with various kitchen condiments. The unlikely condiment you need to be sure to include? Ketchup. Trust me on this. Your kids will love this simple chemistry experiment. It is a great sensory STEM activity for preschoolers and older children. Here is the science of cleaning pennies with ketchup.