Creative Minds 𖹭 Happy Hearts
Building a Simple Speaker Lab Sheet, Magnet and Coil
Sound from a plastic cup and a few feet of copper wire, your student will actually hear the result. This building a simple speaker lab sheet walks through every step from coil winding to plugging in an audio source.
Sound production becomes concrete when students wind 20 to 40 turns of enameled copper wire, suspend the coil inside a cup over a neodymium magnet, and connect the whole assembly to a phone or tablet with a 3.5mm audio cable. The building a simple speaker lab sheet guides grades 4 through 7 through the full build sequence and explains how current through the coil creates an electromagnetic field that pushes and pulls against the magnet to vibrate air into audible sound.
The sheet works as a standalone project inside a unit study on electricity, magnetism, or sound waves, and it pairs naturally with lessons on Faraday’s law or electromagnetic induction. Three open-ended observations ask what happened when sound played, what changing the number of coil turns might do, and how the speaker could be made louder, so your student demonstrates not just assembly skill but the ability to think iteratively about experimental variables.
Sound comes alive when your student winds a coil and connects a magnet. Download the building a simple speaker lab sheet for grades 4-7.
Getting Started with Your Building a Simple Speaker Lab Sheet
Usage Notes
Neodymium magnets are the only specialty item here. The rest, enameled copper wire in 30 to 32 gauge, a cardboard or plastic cup, tape, scissors, and an old headphone cable, are household or easily sourced. The safety panel flags that neodymium magnets can pinch fingers hard and should be kept away from credit cards, electronics, and pacemakers, so review those cautions with your student before the build begins.
Printing Tips
Cardstock at 65-pound weight keeps the sheet flat on a work surface while your student’s hands are busy with wire and tape. Slip it into a plastic page protector if you want to reuse the observation lines across multiple attempts without reprinting.