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

How to make a self-starting siphon

To move liquid from one container to another, you may need a siphon, a bent tube with one end that’s lower than the first. Suction is one way to get the liquid moving through it, but if you don’t have a pump and you don’t want to suck on the end of the tube—something to avoid with liquids you don’t want to breathe or drink—how can you get the liquid moving?

In this clip from Australia’s The Curiosity Show, which ran from 1972 to 1990, science educator Dr. Rob Morrison demonstrates how a self-starting siphon can move the liquid with relative ease. And after you’ve seen the physics, you can make your own self-starting siphon with some bendy straws.

Avoid plastic straws with these compostable, plant-based bendy straws.

Then watch more from The Curiosity Show: Matchstick Triangle Puzzle and how does a music box work?

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...

Which ball will race to the bottom first?

Rion Nakaya

Erosion demonstration: Comparing grass, dead leaves, and soil

Rion Nakaya

Spontaneous Synchronization, a UCLA physics demonstration

Rion Nakaya

Levitate a ball on an invisible stream of air

Rion Nakaya

Fun with Arches, a series of engineering demonstrations

Rion Nakaya

A physics teacher explains tensegrity sculptures with LEGO

Rion Nakaya

Balloon Car Race, a DIY engineering activity for kids

Rion Nakaya

Triple Point of Water Demonstration

Rion Nakaya

The mysterious isochronous curve – The Curiosity Show

Rion Nakaya