Newest
Episode 4
How does data fly through the air?
Radio waves, frequencies, 5G and Bluetooth: how your phone talks to the world without a single wire.
Episodes
Start with a question
Each episode takes one everyday moment apart, in five short chapters.
Episode 3
How does your remote talk to your TV?
Your remote flashes a light you can't see, 38,000 times a second, in a code only your TV understands.
Episode 2
How does a phone call work?
Calls started on iron wires. Now they cross the internet in tiny packets.
Episode 1
What happens when you tap Send?
Your message gets touched, locked, sent through Wi-Fi and across the internet, then drawn on a friend's screen.
For schools and organisations
Need a topic explained?
We make explainer series in this style for schools, education departments, publishers and companies. You choose the topics; we write, check and animate every episode.
Work with us
For teachers
Free to show in class
You can play every episode in your classroom for free. Together they cover how waves carry information: analog and digital signals, infrared, radio, Wi-Fi and 5G. Lesson packs are on the way.
Get the lesson packsMS-PS4-2MS-PS4-3HS-PS4-2HS-PS4-5