📋 Robot's Lesson Units · Unit 3
The internet isn't magic — it's a few parts passing messages. Build one, and you'll understand it forever.
🎯 Objective Kids can name the parts of the internet (device, router, DNS, server) and explain how a web page travels there and back.
🧠 Robot's 3 Questions
The heart of this unit — pause and ask before you click, allow, share, or install:
Ask: “When you type an address and a page appears — what actually happens in between?” Let kids guess. Most think it's instant magic. Today they'll build the real thing and see it's just a few parts passing notes.
Two quick reads to name the players: the web itself, and the address system that finds each computer.
Now build a tiny internet together: place the parts (You → Router → DNS → Server), connect the cables, and send a real request. Watch the packet travel there and come back as a page.
Zoom in on one part: DNS. In the lab, kids look up a website's secret number — the IP address DNS hands back. Names are for people; numbers are for computers.
Zoom in on another part: the message itself. In the lab, kids chop a message into numbered packets, scramble them, and watch them reassemble — that's how everything moves on the internet.
Now the class BECOMES the internet. Give four kids the signs: You, Router, DNS, Server. “You” wants robotexplains.ai. Pass the message card: You → Router → DNS (“the number is 203.0.113.10!”) → back to Router → Server (“here's the page!”) → back to You. Run it twice, then swap roles. Kids feel the whole journey in their feet.
Name the four parts a web page travels through, in order.
Answer: You (your device) → Router → DNS (looks up the address) → Server (sends the page back).
🏠 Take it home Challenge: tonight, explain to a grown-up how typing an address turns into a web page. If you can teach it, you truly understand it!
Part of the Cyber Ready Roadmap · More for parents & teachers