What Students Will Do

  • 🪝 Wind Copper Coils - Hand-wind enameled copper wire into a tight coil (the voice coil that converts electricity into motion)
  • 🧲 Position Magnets - Place neodymium magnets to create the magnetic field the coil pushes against
  • 📋 Assemble the Cone - Attach the coil to a paper plate that amplifies vibrations into audible sound
  • 🔌 Connect & Test - Wire up an audio cable, plug into a phone, and hear music come out of something they just built
  • 🎵 Experiment - Try different volumes, songs, and plate positions to optimize their speaker's sound
  • 🏠 Take It Home - Every student keeps their working speaker and hand-wound coil!

The Moment It Clicks

  • 🤯 "Wait... I can hear it!" - The first time music comes through their paper plate is pure magic
  • 🔎 Invisible Physics Made Visible - Electromagnets are abstract until you hear them vibrate a paper plate with your favorite song
  • 🎧 Plug Into Any Phone - Standard 3.5mm audio jack means they can demo it at home immediately
  • 💡 Same Tech as Real Speakers - Every speaker in every phone, headphone, and concert PA works on this exact principle

What Students Will Learn

Electromagnets

Electric current flowing through a coil creates a magnetic field. Change the current, change the field - that's what makes the cone vibrate.

Sound Waves

Sound is vibrating air. The paper plate cone pushes air back and forth, creating pressure waves your ears interpret as music.

Energy Transfer

Electrical energy from the phone becomes magnetic energy in the coil, becomes mechanical vibration in the cone, becomes sound energy in the air.

Engineering Design

Coil placement, magnet position, and cone attachment all affect sound quality. Small changes make big differences.

Why Schools Love This Workshop

  • Instant Gratification - Music plays through their creation before they leave the room
  • Demystifies Technology - Every speaker in the world works this way. Now they understand how.
  • Impressive Take-Home - "I made this" hits different when you plug it into a phone and music comes out
  • Cross-Curricular - Touches physics, engineering, music, and math (coil winding requires counting turns)
  • Low Material Cost - Copper wire, magnets, paper plates, and audio cables
  • Works for Gifted Programs - Deep enough physics for advanced learners, visual enough for any student

Workshop Flow

  • Demo (5 min) - "How does a speaker work?" Take apart a real speaker, show the coil and magnet inside
  • Wind Coils (15 min) - Each student winds their copper coil around a form, counting turns for consistency
  • Assemble (15 min) - Mount coil to paper plate, position magnets, connect audio cable
  • Test & Tune (15 min) - Plug in, play music, adjust for best sound quality
  • Science Talk (10 min) - How does this connect to electromagnets, energy transfer, and real-world speakers?

Workshop Details

  • Format: Single session hands-on build
  • Duration: 60 minutes
  • Group Size: Up to 20 students
  • Space Needed: Tables for building, relatively quiet room for testing
  • Equipment: All materials included
  • Takeaway: Students keep their working speaker and hand-wound coil!

Perfect For

  • Gifted Programs - Deep electromagnet physics with tangible results
  • 3rd-8th Grade STEM - Core age range, scales from basic to advanced
  • Science Units on Sound/Energy - Perfect companion to waves, energy transfer, or electromagnet units
  • Maker Spaces - Real fabrication skills (coil winding) with real output
  • After-School Clubs - Engaging, complete in one session, everyone succeeds