Water activities are so easy to set up and perfect for young kids to play and learn with science. Every day materials and supplies become awesome preschool science experiments. There are tons of ways to investigate water science all year round! Learn about absorption as you investigate what materials absorb water with this fun experiment below.

Water Science Activity Exploring Water Absorption for Kids STEM

What Absorbs Water?

We have played around with cotton balls and water before. Watching the cotton balls fill up with water and then observing what happens to the cotton ball, both wet and dry.

This time I decided to make the water absorption experiment a little more challenging by having him guess which materials he thought might absorb the water and which might not.

We talked about how some materials repel water (do not absorb). I had him make some guesses before we started to see what he thought. Time to experiment and observe!

water absorption what does not absorb science

How To Do Science Experiments At Home

Science learning starts early, and you can be a part of that with setting up science at home with everyday materials. Or you can bring easy science experiments to a group of kids in the classroom!

We find a ton of value in cheap science activities and experiments. All our science experiments use inexpensive, everyday materials you can find at home or source from your local dollar store.

We even have a whole list of kitchen science experiments, using basic supplies you will have in your kitchen.

You can set up your science experiments as an activity focusing on exploration and discovery. Make sure to ask kids questions at each step, discuss what is happening and talk about the science behind it.

Alternatively, you can introduce the scientific method, get kids to record their observations, and make conclusions. Read more about the scientific method for kids to help you get started.

Even though the scientific method feels like it is just for big kids…

This method can be used with kids of all ages! Have a casual conversation with younger kiddos or do a more formal notebook entry with older kiddos!

Get your free science journal pages!

Learn About Water Absorption

Put the scientific method into practice with this easy to set up science experiment. Extend the activity for older kiddos by changing the independent variable and measuring the dependent variable.

For example; explore what happens if you add the same amount of water to different materials. Or investigate how different fabrics of clothing absorb water.


I put out the following materials in no particular order for our water science experiment.  Free to substitute materials for whatever you have available.

  • sponge
  • styrofoam tray
  • napkin
  • wax paper
  • sock
  • zip lock bag
  • paper towel
  • sandwich wrap
  • construction paper
  • aluminum foils
  • of course cotton balls!

I also set out a bowl of colored water (better to observe with colored water) and an eye dropper for precise experimentation. Very simple set up. Use what you have in your cupboards, closet and recycling bin!

YOU MIGHT ALSO LIKE: What Dissolves In Water

water absorption simple science set up table


STEP 1. First think about which materials might absorb the water and which might repel the water.  Make your predictions!

STEP 2. Carefully fill the eye dropper and then squeeze some water onto each material.

water absorption simple science observations

Materials That Absorb Water

Here is what we learned! As we tested each item with the water, I asked him what he thought. Did it absorb water? Did it not absorb the water?

He definitely understood the difference, and we had fun checking out what each one did!  We can say that absorption is when something takes in another substance.

Materials that absorb water include; sponge, napkin, paper towel, face cloth, sock, paper, cotton balls. 

Materials that don’t absorb water include; Styrofoam, zip lock bag, wax paper, aluminum foil, sandwich wrap.

What are the characteristics of materials that absorb water?

Materials that absorb water are described as porous. Porous simply means capable of absorbing liquids. Porous materials have pores or openings that allow air or water to pass through easily. Materials that repel water or don’t absorb water are called non-porous.

Sponges and cotton are examples of materials found at home that are very porous and absorb water very easily. So if you are cleaning up a spill grab a cotton rag instead of a polyester shirt.

Plastic cups, metal forks and spoons, ceramic plates are examples of materials found at home that do not absorb water. Which is what you want when you are drinking water or eating food!

water absorption what absorbs simple science

ALSO CHECK OUT: Water Experiments For Kids

To wrap up our water absorption experiment, he engaged in some free play. He experimented with different colors, adding more water to different materials, and using the sponge to pick up water!

water absorption simple science sponge experimenting

More Fun Water Experiments

There are so many fun ways to explore water science. Here are a few of our favorites…

Helpful Science Resources

Here are a few resources that will help you introduce science more effectively to your kiddos or students and feel confident yourself when presenting materials. You’ll find helpful free printables throughout.

50 Easy Science Experiments For Kids

Click on the image below or on the link for more easy science experiments for kids.


  1. This is so awesome! I love that you can just use things you have around the house. I’m definitely going to be trying this one. Pinned!

  2. Thanks Emma. I have to be budget friendly and since I never know how long he will be into something I have been leaning towards using what we have around! I could go crazy at the craft store and I shouldn’t!

  3. Fantastic! I am a big believer in simple science for preschool, this is a perfect example. I’ve found that listening to children’s questions about how things work is the biggest idea supplier for simple experiment set ups!

  4. I love science experiments and the kids love them so much! Definitely going to be doing this at home with my girls! Thank you for stopping by the Thoughtful Weekly Blog Hop and linking up! You are featured this week as one of my favorites from last weeks hop!

  5. They definitely do! Thank you so much for featuring us! Hope your girls enjoy the experiment

  6. This is so easy my kids would love this! I also. love that you can so this activity with things you have around the house.

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