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

What is surface tension? Ask a water strider.

Modern technologies like high speed cameras can allow us to see what was previously ‘invisible’ to the naked eye. This clip from Richard Hammond’s Invisible Worlds provides two memorable slow motion examples: A speedy water strider skating on the water’s surface and a drop of milk in water. “It has to do with the elastic property of the water surface, a phenomenon called surface tension.”

Follow this video with these: Seven DIY surface tension experiments, Surface Tension and The Cheerios Effect, Stroke Of The Water Strider, and Flottille: Unfolding micro-origami.

Plus: What is the fastest accelerator on the planet?

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.

🌈 Watch these videos next...

Liquid Density Experiment: How to stack a liquid layer rainbow

Rion Nakaya

Stanford researchers solve the mystery of the dancing droplets

Rion Nakaya

Flottille: Unfolding micro-origami by Etienne Cliquet

Rion Nakaya

Coalescence cascade: The bouncing droplet in slow motion

Rion Nakaya

Seven surface tension experiments – Physics Girl

Rion Nakaya

Float by Susi Sie

Rion Nakaya

The Color Changing Milk Experiment

Rion Nakaya

Soap bubble turbulence: Rainbows spin on the surface of a bubble

Rion Nakaya

Soap Powered Boats – ExpeRimental

Rion Nakaya