Science Experiments
The Secret Dancing Salts Energy Drum Experiment
Create a vibration-powered acoustic membrane drum to see and manipulate invisible soundwaves using colorful salt particles
Grab 1–2 things 45 min Ages 6–11 years 1–3 players Indoor
Acoustic observationFine motor controlData recordingHypothesis testing
Unlock this activity
Sign in to use one of your 3 free weekly unlocks.
Learning benefits
- 💡 This activity teaches children about physics and acoustics by visualizing invisible mechanical waves. It bridges the gap between auditory sensory input and tactile, visual observation, demonstrating pressure changes. It also fosters scientific inquiry as kids manipulate variables like pitch and volume to see direct physical results.
Safety notes
- ⚠️ Adult supervision is required when cutting the latex balloon with scissors. Keep uninflated balloons away from children under 8 years of age to prevent choking hazards. Do not place the speaker directly against the ear, and maintain a safe volume level during the sound tests to protect hearing.
Cleanup
- 🧹 Use a small hand broom to sweep any stray salt on the newspaper into a trash bin or sealable container for future play. Wipe down the tin can and balloon membrane with a dry microfiber cloth to remove salt dust. Store the speaker, rubber bands, and extra salt in a dry storage tub.