Digestive System Worksheets and Activities + Free Foldable (Grades 3–5)
Inside: Explore the human digestive system with hands-on worksheets for Grades 3–5, including a FREE lift-the-flap anatomy printable! I’ll show you how to use the foldable to teach the digestive organs, plus some additional activities and a simple stomach experiment to help children understand what happens to food after we swallow it.
Teaching the digestive system can be surprisingly tricky. Most children know that food goes into the stomach, but what happens after that? What does the small intestine actually do? And why do we need a liver, gallbladder, and pancreas if food doesn’t even pass through them?
I think one of the challenges with teaching human anatomy to elementary students is helping them understand how the different organs work together, rather than simply memorizing their names.
A labeled diagram is a useful starting point, but I wanted something more interactive. So I created a Digestive System Lift-the-Flap Activity where children can actually open the body illustration, identify the organs, and discover what each one does.
The foldable is completely free, and I’ve also created a more complete mini study of digestive system worksheets for Grades 3–5 for families who want to continue the lesson.
Let’s look at how you can use them!
Pin this image to read the article later. 📌
FREE Digestive System Lift-the-Flap Printable
I designed this foldable for children in Grades 3–5 who are learning about the main organs of the digestive system. Instead of simply writing labels on a worksheet, children build an interactive paper model.
The outer illustration opens in the middle, revealing the digestive organs underneath. Inside, children match seven organ names to their functions, attaching smaller flaps that can be lifted to read the explanations.
It’s a combination of a coloring activity, anatomy labeling exercise, and hands-on science craft.
If you’d like to try this hands-on anatomy activity with your kids, you can download the free PDF below. This free resource contains the foldable activity and assembly instructions. The additional worksheets, experiment, and teacher notes are part of the complete Mini Science Study, which I’ll show you further down.
What’s Included in the Free PDF?
The free printable includes:
- A full-color digestive system cover and inside anatomy page.
- A black-and-white version children can color themselves.
- Seven organ-name flaps with matching descriptions.
- Step-by-step assembly instructions.
You’ll need scissors, glue, and colored pencils if you’re using the black-and-white version. I included both versions because sometimes it’s helpful to have a ready-colored model, while other times coloring the organs is part of the lesson itself.
For younger students, I would read the descriptions together before they attach the flaps. Older children can try matching the organs independently.
How Does the Human Digestive System Work?
Before starting with the printable, I would spend a little time explaining what digestion actually means.
Digestion is the process of breaking down food into smaller substances that our bodies can absorb and use.
It involves several organs working together, and each has a specific job. Here’s a simplified journey that works well for elementary students:
- Mouth: Digestion begins when we chew food and mix it with saliva. Our teeth break food into smaller pieces, while saliva starts the chemical digestion of starch.
- Esophagus: This muscular tube moves swallowed food toward the stomach using contractions called peristalsis.
- Stomach: Food is churned and mixed with stomach acid and digestive enzymes.
- Small intestine: Most chemical digestion is completed here, and most nutrients are absorbed into the body.
- Large intestine: The remaining material passes through the large intestine, where much of the remaining water is absorbed and solid waste is formed.
- Rectum: Stores solid waste until it leaves the body through the anus.
But what about the other organs we see in digestive system diagrams?
The liver, gallbladder, and pancreas are important digestive helpers. The liver produces bile to help with fat digestion, the gallbladder stores and releases bile, and the pancreas produces digestive enzymes.
Food doesn’t actually travel through these three organs, which is something I think is worth pointing out to children.
This is also a good opportunity to introduce the difference between mechanical and chemical digestion. Chewing and stomach churning physically break food apart, while digestive chemicals, including enzymes, break larger food molecules into smaller ones.
Children don’t need to memorize every digestive enzyme at this age, but understanding these two processes will help them see why digestion involves much more than the stomach.
How to Use the Digestive System Foldable
I wouldn’t rush straight into cutting and gluing. Start by looking at a digestive system diagram together. Ask your child to find the mouth, esophagus, stomach, and intestines. Talk about what each one does and see how much they already know.
Then it’s time to assemble the model. There are two main pieces: the Cover Page, which creates the opening doors, and the Inside Anatomy Page, which contains the organ descriptions and smaller labeling flaps. Children cut out the pieces, match each organ name to its function, and attach the cover using the glue tabs. The completed model opens to reveal the digestive system underneath. Once the foldable is finished, I would use it for a few quick challenges.
Ask your child to trace the journey food takes, starting at the mouth. Have them open the small flaps and explain what happens in each organ. Then close the flaps and see how many organ functions they can remember without looking!
One of my favorite questions for this activity is:
Does food pass through every organ shown in the model?
This encourages children to think about the difference between the digestive tract and the organs that help digestion.
You can also ask them to locate the pancreas and gallbladder. Both are shown in the illustration, even though they aren’t included among the seven labeling flaps.
More Digestive System Worksheets and Activities for Grades 3–5
The foldable works as a standalone activity, but I also wanted to create a short science study that children could complete in one or two sessions. That’s how my Digestive System Anatomy Mini Science Study came together.
It’s a 15-page printable PDF that includes the foldable, informational material, additional worksheets, a hands-on investigation, and teacher notes.
The idea is simple: children first learn the anatomy, then explore how the digestive system works, and finally apply what they’ve learned.
1. Follow Your Food! — Digestive System Sequencing Worksheet
Understanding the order in which food moves through the digestive system is just as important as recognizing individual organs. In this worksheet, students put the digestive organs in the correct sequence and complete short sentences about their functions. They also answer a question about the liver and its role in digestion. It’s a useful way to check that children understand the digestive process instead of simply remembering where each organ appears in a picture.
2. Can You Model a Stomach? — A Simple Digestion Experiment
I like including a practical investigation whenever it helps children understand a scientific process. For this activity, students use a resealable plastic bag, a little water, and a piece of soft bread to model the stomach’s churning action. They make a prediction, squeeze the bag gently, and record what happens to the bread. The important thing here is understanding what the experiment actually demonstrates.
Squeezing the bag represents mechanical digestion, but the model doesn’t reproduce the chemical action of real stomach acid and digestive enzymes. I included questions about this distinction because I want children to understand that scientific models are useful, but they also have limitations.
It’s an easy experiment to prepare at home or in the classroom, and you don’t need any specialist materials.
3. Think Like a Scientist! — Digestive System Questions
For Grades 3–5, I wanted to include questions that require a little reasoning instead of only matching terms to definitions. Children explore questions such as why we chew food, how the liver helps digestion, and why the small intestine has millions of tiny finger-like projections called villi. They also consider what might happen if the large intestine absorbed too little water.
The bonus challenge introduces peristalsis:
Could food still reach your stomach if you were lying down?
It’s a simple question, but explaining the answer requires children to use what they’ve learned about the digestive system.
4. Digestive System Coloring Challenge
I also included a digestive system coloring worksheet, but it’s not simply a picture to decorate. Students use a specific color key to identify nine different organs, including the pancreas and gallbladder. I think coloring can be useful for science when children have to look closely at the structures they’re studying and distinguish one from another. This activity is especially helpful for reviewing anatomical locations after completing the foldable.
There’s also a little fact about why the small intestine is actually longer than the large intestine, despite its name!
How I Would Adapt These Digestive System Worksheets for Different Grades
Although the mini science study is intended for Grades 3–5, I wouldn’t expect every child to complete it in exactly the same way.
For Grade 3, I would focus on understanding the organ functions and completing the foldable together. Children can answer some of the longer questions orally if needed.
By Grade 4, most students should be ready to work more independently on the sequencing worksheet and explain what happens in the different organs.
For Grade 5, I would spend more time discussing mechanical versus chemical digestion, nutrient absorption, and what the stomach experiment can and cannot demonstrate.
The activities can also work as a supplement to a more extensive human body study.
If you’re planning to explore anatomy in greater depth, you might find my homeschool anatomy curriculum review helpful. I’ve looked at resources that allow children to explore human biology beyond basic diagrams and organ names.
More Hands-On Science Activities
Once children understand the main digestive organs, there are several directions you can take the lesson.
You could explore how the digestive system works alongside the circulatory system to transport nutrients, compare digestion in different animals, or investigate how teeth are adapted for different types of food.
👉 You might also want to read about:
Final Thoughts
I don’t think an elementary anatomy lesson needs to cover every detail of a body system to be useful. For Grades 3–5, understanding the main digestive organs, following the journey food takes, and explaining a few important processes is a meaningful starting point.
The foldable gives children something they can build and return to, while the additional digestive system worksheets help them practice explaining what they’ve learned. If you’re short on time, start with the free lift-the-flap activity. You can complete it in one sitting and come back to the science questions another day.
And if your child is interested in learning more about digestion, the complete Mini Science Study gives you a few additional ways to explore the topic without having to plan everything yourself.
This post may contain affiliate links. By making a purchase through these links, I get a small percentage for the item you bought while the price stays the same for you. Thank you for supporting me.
Read my Disclosure to find out more about how I support my website and how you can help.
Have you tried lift-the-flap activities for teaching anatomy or other science topics? I’d love to hear which body system or science subject your children would like to explore next!
