Science · Stage 3
Making Sounds: Vibration and Pitch
Every sound is a tiny wobble — let's feel it, follow it, and find out why some sounds are high and some are low!
✦ Science📘 Stage 3 · S3⏱ ~10 min🧒 Ages 7–8★ Free to start
explore how vibration makes sound, how it travels, high and low pitch, and how materials block or carry it.
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Kavi Twangs a Ruler
Kavi holds a ruler over the edge of the desk and twang 〰️ — it wobbles so fast you can barely see it! "Did you hear that? Every sound starts with a tiny vibration, a fast wobble back and forth. Let's find out how that wobble travels to your ear, and why a little bird sounds high but a big drum sounds low!"
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What your child will learn
1Sound starts with a wobbleEvery sound is made by something vibrating — moving back and forth very fast. Tap each one to feel the wobble!
2How sound reaches your earA sound travels from the thing that wobbles all the way to your ear. Tap each step to follow it!
3High sound or low sound?Fast wobbles make a HIGH sound. Slow wobbles make a LOW sound. Tap the right box for each one!
4Try it and test itUse what you know about vibration, pitch, and travel. Predict, then tap to check! Tap Next test for more.
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A peek inside
Kavi twangs a ruler on the edge of the desk 〰️ and it makes a buzzing sound. Why is there a sound?
The ruler moves back and forth very fast. That fast wobble is a vibration, and vibrations make sound.
Try this at home: What makes every sound? (one word)
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Science · Stage 3 · S3 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.