Paper Worm Experiment

The Paper Worm Experiment is a simple and fascinating science activity that uses paper, markers, and water to create the illusion of a crawling worm. Children love watching the paper curl and wiggle as it absorbs water, making this experiment a fun way to explore basic scientific concepts such as capillary action and material expansion.

This easy STEM activity requires only a few household supplies and provides a great opportunity to combine creativity with hands-on learning.

One afternoon, we were looking for a quick science project that didn't require special materials. After drawing colorful paper worms and placing them on a plate of water, we were amazed to see them slowly begin to move and curl. The excitement of watching a flat piece of paper come to life sparked plenty of questions about how water affects different materials. Since then, this paper worm experiment has become a favorite because it is inexpensive, easy to set up, and always surprises first-time participants.

A fun STEM activity where a curled paper worm appears to move when placed in water.

Print Recipe Pin Recipe

Course: Science Activity

Cuisine: Educational

Ingredients Equipment Method Notes

Ingredients

  

• 1 sheet printer paper
• 1 set washable markers
• 1 small amount water

Equipment

• Scissors
• Pencil
• Shallow Plate

Method

 

1. Draw a worm shape on printer paper.
2. Cut out the worm.
3. Wrap the worm around a pencil to curl it.
4. Pour a thin layer of water into a shallow plate.
5. Place the worm in the water and observe the movement.

Notes

Printer paper works best for creating movement.

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Why Kids Love This Experiment

Looks Like Magic

The paper appears to move on its own when placed in water, creating an exciting visual effect.

Quick and Easy Setup

Most of the supplies can be found at home, making it perfect for spontaneous science fun.

The experiment is simple enough for young learners while still teaching important scientific principles.

Materials You'll Need

Basic Supplies

• White printer paper
• Washable markers
• Scissors
• Shallow plate or tray
• Water

Optional Supplies

• Colored paper
• Permanent markers
• Eyeball stickers
• Glitter pens

These additions allow children to personalize their worms.

How to Make a Paper Worm

Step 1: Draw Your Worm

Using markers, draw a long worm shape on a piece of paper.

Make it approximately:

• 4–6 inches long
• 1 inch wide

Add eyes, stripes, or other decorations.

Step 2: Cut Out the Worm

Carefully cut along the outline.

You should now have a flat paper worm.

Step 3: Curl the Worm

Wrap the paper worm around a pencil.

Hold it for several seconds to create a curled shape.

Remove it carefully so the curl remains.

Step 4: Prepare the Water

Pour a thin layer of water onto a shallow plate or tray.

Only a small amount is needed.

Step 5: Place the Worm in Water

Set the curled paper worm gently onto the water.

Watch closely as it begins to uncurl, twist, and move.

The Science Behind the Experiment

Water Absorption

Paper is made of tiny fibers that absorb water.

When one side of the paper absorbs water faster than the other, it expands.

Uneven Expansion

Because the paper absorbs water unevenly, it changes shape and begins to uncurl.

This movement creates the appearance of a living worm.

Capillary Action

Water travels through the tiny spaces between paper fibers through a process called capillary action.

This movement contributes to the curling and stretching effect.

Educational Benefits

Introduces STEM Concepts

Children learn about:

• Water absorption
• Capillary action
• Material properties
• Scientific observation

Encourages Curiosity

Kids often want to test different variables, making this experiment perfect for scientific exploration.

Fun Variations

Rainbow Worms

Use multiple marker colors to create bright designs.

Giant Worms

Make larger worms and compare their movement.

Thick vs Thin Paper

Try:

• Printer paper
• Construction paper
• Cardstock

Observe which moves best.

Worm Race

Create several worms and see which one uncurls first.

Tips for Success

Use Thin Paper

Regular printer paper works best because it absorbs water quickly.

Curl Tightly

A tighter curl produces more dramatic movement.

Don't Overfill the Tray

Too much water can flatten the worm too quickly.

Experiment With Shapes

Try spirals, snakes, or other curved designs.

Frequently Asked Questions

Why does the worm move?

The paper absorbs water and expands unevenly, causing it to uncurl.

What paper works best?

Standard printer paper typically produces the best results.

Can I use colored paper?

Yes, but some colored papers absorb water differently.

Is this experiment safe?

Yes. Adult supervision is recommended when using scissors.

Can I reuse the worm?

Once wet, the worm usually loses its curl and is best remade for future experiments.

Conclusion

The Paper Worm Experiment is a simple, inexpensive STEM activity that transforms an ordinary piece of paper into a moving science demonstration. By combining creativity with scientific discovery, children can learn about water absorption and capillary action while having fun. Whether used in a classroom, homeschool setting, or as an afternoon activity, this experiment is sure to capture attention and inspire curiosity.