TV on a Rolling Cart

Why were traffic lights invented?

From Mystery Doug

Why were traffic lights invented?
8 minK1st2nd3rd4th5thScienceSocial Studies
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Summary

Mystery Doug takes on a real kid's question -- "Why were traffic lights invented?" -- and follows the clues. Traffic lights were invented as cities grew crowded, giving cars and people clear turns so the streets stayed safe. A quick five-minute watch to spark curiosity and kick off a conversation.

Viewer safety

All ages
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Teaching resources

Discussion questions

Discussion

Doug investigates a question kids really asked: "Why were traffic lights invented?"

  1. What was Doug's answer to today's question, in your own words?
  2. What surprised you most about traffic, or what did you already know?
  3. What's one thing this makes you want to find out more about?

Quick work-a-long

Words to know: traffic, signal, safety.

Try it: Explain the answer to "Why were traffic lights invented?" to someone at home using these three words, then write down one new question it made you wonder.