Science Experiment: Water Cleansing Project Science Experiment: Water Cleansing Project

Our children should know that the clean water they take for granted doesn’t run from God’s hand into the spigot. It needs to be cleaned using precise processes and many steps! This project in water cleansing will help kids see that even the most things on earth get dirty and need cleansing—including drinking water, and including our souls!


  • Large plastic bowl
  • Large glass jar (like a mayonnaise jar, clean and dry)
  • Large Plastic kitchen funnel
  • Paper Towels
  • Cotton Balls
  • Sand
  • Gravel
  • Activated charcoal
  • Dirty water
  • Plastic cups

Note: Activated charcoal can be purchased as a powder, tablets or in capsules. at drug stores and health food stores. Or online at

When we turn on our faucets and clean water comes out do you ever wonder how that miracle happens? It happens because we live in a country where water systems are filtered to help keep out harmful pollutants. The water systems in America can remind us a little of Jesus and what he does for us. We often come to him grimy with sins we committed. Thanks to his love, he forgives, and we become spiritually clean again. Let’s clean some dirty water with a cleansing process and think of our hearts, souls and minds as we do it, and how Jesus makes us spiritually clean .


1. Make clean water dirty by simply putting soil into bowl of water, or have children make their hands dirty by rubbing them on a dirty surface (like a floor) and then placing hands into the bowl of water and using soap to scrub them clean.
2. Place the funnel over top of a clean large glass jar.
3. Place the paper towel, cotton balls, sand, gravel and active carbon inside the funnel in the order stated. Press down to compact all the ingredients.
4. Use paper cups to scoop up dirty water to pour into the funnel.
5. Wait to see how the water changes as it seeps through the funnel and gets into the glass jar.


The items put into the funnel act as water filters. Almost every water source that supplies drinking water has some kind of filtering system. Home filters are also available in home water pitchers in which charcoal is the main ingredient.


When God first made water, it was really clean. When God first made man, he was really clean too—in his heart, soul and mind. But after man sinned, things happened to mankind. People could get old and decrepit looking. People could smell bad. People could act up and hate each other. And the water that served man eventually got polluted.

Let’s remember the cleaning processes we go through to make our water drinkable and think of Jesus’ cleansing power:

  • The paper towel is for our selfish thoughts and actions.
  • The cotton balls are for the fights we start with siblings or friends.
  • The sand is for the lazy way we feel, so we don’t do our chores.
  • The gravel is for when we’ve told a lie.
  • The active carbon is for whatever is left that we messed up this week.

1 John 1:9 says, “If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.”

Jesus is our purification process!

Copyright 2013 Mary Kate Warner