Brains On! Science podcast for kids It's time for the....Mystery Sound Extravaganza!
Mar 10, 2026
Eleven bite-sized mystery sounds from around the world keep listeners guessing. Clips include clattering knives on a magnetic strip, sizzling butter, hula-hoop beads, dry ice scooping in a lab, and a garage door closing. Playful back-and-forth guessing and surprising real-world sources make the segment lively and fun.
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Jello Shake Sound From Seattle
- A wobbly, bubbling sound that suggested boiling turned out to be jello being shaken in a glass bowl.
- Thor from Seattle recorded himself shaking jello, a texture-sensitive sound that some find unpleasant.
Hula Hoop Beads Sound Like Rice
- A rhythmic rattle resembling rice in a bowl was revealed to be beads inside a hula hoop while someone hula hooped outside.
- Eleanor from Dallas explained the little beads make the rice-like sound as the hoop moves around hips.
Medical Machines Can Sound Deceptively Mechanical
- A noisy, mechanical-sounding clip that seemed like a dental drill was actually a blood pressure cuff inflating.
- James Hull, a pharmacist from Oakville, Ontario, explains cuffs inflate to measure blood pressure and prevent cardiovascular disease.