
Kindergarten Science: My Second Experiment
This year my son and I had the opportunity to work on our first kindergarten science project together. As I mentioned in my previous post about my daughter’s first kindergarten science project, these projects sure have evolved since I was a 5 year old. In this project, we learned what solution would be best for cleaning pennies.

Which solution best cleaned the pennies?
I’m not sure which one of you out there is cleaning your pennies but if you need to know which solution is best, you might want to try this experiment. Here’s how you can recreate it at home.
Kindergarten Science: Cleaning Pennies
Here’s what you’ll need:
- Soap and Water
- Lemon Juice
- White Vinegar and 1 tbsp Baking Soda
- Alcohol
- 4 bowls
- Pen or Pencil
- Paper or Post-it Notes
Procedure: Place one penny in each bowl. Cover each penny with one of the solutions. Label each as you go. Let sit for 10 to 15 minutes. Rise and dry. Note which solution cleaned the pennies the best.
You can also try these ingredients, too!
- Ketchup
- Soy Sauce
- Hot Sauce
Need some ideas for fun and easy science projects to do with your kids? Try these:
- Walking Water Rainbow Science Experiment
- Super Cool Lava Lamp Experiment
- Ice Color Mixing Science Experiment
- Bubble Droppers Science Experiment
- Glowing Bouncy Egg
- Color Mixing Pouring Station
Have fun!
Meghan says
It loooks like the lemon cleaned it the best.
Dayngr | Dayngrous Discourse says
The lemon was kicking butt but the vinegar won in the end.
Justin says
Uh oh, where’s your control sample?