Science · Kindergarten · Force, Motion, and Interactions · Weeks 1-9

Magnets: Invisible Forces

Students explore the attractive and repulsive forces of magnets on various materials.

About This Topic

Magnets are one of the most engaging ways to introduce young students to the idea that forces do not always require contact. A magnet can pull a paperclip without touching it, and that observation surprises almost every Kindergartner who encounters it for the first time. This topic uses that surprise to build vocabulary around attraction and repulsion and to help students classify materials as magnetic or non-magnetic through direct testing.

While this topic does not map to a specific NGSS standard at Kindergarten, it directly supports physical science inquiry skills by asking students to test, classify, and explain what they observe. In US classrooms, magnets also serve as a natural bridge to engineering: students who understand that magnets attract and repel can begin to imagine using them intentionally to move objects or build simple sorting games.

Active exploration is the right approach for magnets because the invisible nature of magnetic force is genuinely difficult to believe without personal experience. A student who drags a magnet under a piece of paper to move a paperclip on top of it, watching it move with no visible cause, is having a real scientific experience. That sense of wonder is valuable to extend through further experimentation rather than explain away too quickly.

Key Questions

1. Differentiate which objects are attracted to a magnet and which are not.
2. Predict what happens when two magnets are brought close together.
3. Design a game using magnets to move small objects.

Learning Objectives

• Classify objects as magnetic or non-magnetic based on experimental results.
• Predict the interaction (attraction or repulsion) between two magnets based on their pole orientation.
• Design a simple game that utilizes magnetic forces to move small objects.
• Explain that magnets have an invisible force that can attract or repel objects.

Before You Start

Properties of Objects

Why: Students need to be able to observe and describe the characteristics of different objects before classifying them as magnetic or non-magnetic.

Push and Pull Forces

Why: Understanding basic concepts of push and pull helps students grasp the ideas of attraction and repulsion as types of forces.

Key Vocabulary

Magnet	An object that produces a magnetic field, which can attract certain metals or repel other magnets.
Attract	When two magnets pull towards each other, or when a magnet pulls certain objects closer.
Repel	When two magnets push away from each other, preventing them from coming together.
Magnetic	Describes materials that are attracted to magnets, such as iron or steel.
Non-magnetic	Describes materials that are not attracted to magnets, such as wood or plastic.

Watch Out for These Misconceptions

Common Misconception

All metals are magnetic.

What to Teach Instead

This is one of the most persistent early science misconceptions. When students test aluminum foil or a copper coin and find it is not magnetic, that discovery is powerful. Providing enough variety in the test materials to include non-magnetic metals makes the sorting experience genuinely informative rather than simply confirming what students already expect.

Common Misconception

Magnets pull everything equally, regardless of distance.

What to Teach Instead

Students may think a bigger magnet always wins or that distance does not matter. Testing how far away a magnet can still attract a paperclip by moving it gradually closer shows that magnetic force weakens with distance. Active experimentation delivers this understanding far more clearly than simply telling students.

Active Learning Ideas

Inquiry Circle: Magnetic or Not?

Each pair receives a bag of ten small objects: a paperclip, an eraser, a button, a coin, a bolt, a plastic cap, aluminum foil, a rubber band, a wooden bead, and a key. Students test each with a bar magnet and sort them into two labeled cups labeled sticks and does not stick.

20 min·Pairs

Simulation Game: Repel and Attract

Give each small group two bar magnets. Students bring the ends together and feel the push (repel) and the pull (attract). They mark the ends with colored tape after discovering which combinations push apart and which pull together, then try to describe the pattern they found.

20 min·Small Groups

Inquiry Circle: Magnet Fishing Game

Groups design a simple fishing game using a magnet on a string as the rod and paper fish with paperclip mouths. They test whether different numbers of paperclips on a fish make it harder to catch, then discuss what that tells them about magnetic force and distance.

30 min·Small Groups

Think-Pair-Share: Why Did It Not Stick?

After the sorting investigation, pick one surprising non-magnetic object like aluminum foil that students typically predict will be magnetic. Students share with a partner why they think it did not stick, then the class discusses: it is metal, so why does the magnet not work on it?

10 min·Pairs

Real-World Connections

• Refrigerator magnets are used daily to hold notes and pictures on metal doors, demonstrating attraction without direct contact.
• Magnetic clasps are found on jewelry and purses, providing a simple and reliable way to keep them closed.
• Junkyard cranes use powerful electromagnets to lift and move large metal objects like cars, showcasing the strength of magnetic forces.

Assessment Ideas

Quick Check

Provide students with a collection of various objects (e.g., paperclip, coin, crayon, button, foil) and a magnet. Ask them to test each object and sort them into two groups: 'Magnetic' and 'Non-magnetic.' Observe their sorting process and ask them to explain why they placed an object in a specific group.

Discussion Prompt

Hold up two magnets. Ask students: 'What do you think will happen when I bring these two magnets close together?' After they share predictions, demonstrate attraction and repulsion. Ask: 'Why did they push away sometimes and pull together other times? What did you see?'

Exit Ticket

Give each student a small piece of paper. Ask them to draw one way they could use a magnet to play a game. They should include at least one object the magnet will move.

Frequently Asked Questions

What magnet types are safest for Kindergartners?

Use large bar magnets or horseshoe magnets with plastic-coated ends. Avoid neodymium (rare earth) magnets entirely. They are extremely strong, can pinch skin badly, and are dangerous if two are swallowed. Ceramic bar magnets are the standard classroom choice and are strong enough to demonstrate all the relevant effects with everyday objects.

How do I explain why some metals are not magnetic?

Keep it honest and simple: different metals are made of different tiny parts, and only some of those parts respond to a magnet. Iron and steel have the right kind; aluminum and copper do not. You do not need to go deeper than this for Kindergarten. The sorting experience itself is more valuable than the explanation at this age.

How can I connect magnets to the push-and-pull vocabulary from earlier in the unit?

Framing attraction as a magnetic pull and repulsion as a magnetic push directly connects to K-PS2-1 vocabulary. Students already know that forces can push and pull. Now they are meeting a force that does both without any contact between objects. That connection deepens their understanding of forces as a broader category that includes invisible ones.

How does designing a magnet game support active learning goals for this topic?

Designing a game requires students to apply their knowledge purposefully. They must choose magnetic materials, figure out how to make the game work, and test it with a partner. If the paperclip fish do not get attracted, the game fails. That immediate, real-world feedback makes this design task one of the most authentic forms of assessment for this topic.