Acoustic Singing Water Goblet Crystal Chime

25 mins Ages 4-6 Indoor

A playful, screen-free adventure designed to spark curiosity, sensory exploration, and fine motor skills for kids aged 4 to 6.

Materials Needed

  • • Smooth glass drinking tumblers or stemmed wine glasses (3 units)
  • • Pitcher of water (1 unit)
  • • Food coloring (optional tinting) (1 set)

Pro Tips

  • → Clean the rim of a smooth glass tumbler thoroughly so there is zero oil or grease on the edge.
  • → Fill three glasses with different levels of water (full, half, quarter).
  • → Dip your index finger in clean water and glide it lightly around the rim in continuous circles: friction catches and slips on the glass, generating a ringing musical hum.

Safety First

Adult supervision required when handling glassware; do not press down too hard on thin glass rims.

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Step-by-Step Instructions

1

Step 1

Wash and rinse three smooth glass tumblers to remove all oils from the drinking rims.

2

Step 2

Fill Glass 1 full of water, Glass 2 half full, and Glass 3 with 2 cm of water.

3

Step 3

Wet your index finger with clean water and rub it gently and continuously around the glass rim.

4

Step 4

Listen to the glass begin to sing, comparing the high pitch of the nearly empty glass to the low hum of the full glass.

What they are learning

Stick-slip friction acoustic excitation Resonant frequency column pitch modulation Acoustic wave vibration feel