Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

“Balloons look really weird when they resonate.” – Steve Mould

What is the resonant frequency of a balloon? Steve Mould hooked up a balloon to a scientific vibration generator to find out.

Resonating balloons look really odd on camera. What you see is a sort of slow motion. It’s actually the stroboscopic effect. The image is made stranger by the addition of rolling shutter.

Learn more about the stroboscopic effect at the end of Mould’s physical demonstration of gravitational waves video and via these 3D-Printed “Blooming” Fibonacci Zoetrope Sculptures.

Plus: Resonance, forced vibration, and a tuning forks demo, Mercury Hz: Sound waves passing around & through mercury, and water balloons falling (and bouncing) in slow motion.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.