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🤖 Robotics coding for kids

The track where code makes something happen instead of printing something. Drive, turn, read a rangefinder, follow a wall, escape a maze — in Python, in a simulated room.

Start the Robots track

How this track is kept honest

Every number the robot produces comes out of geometry: the rangefinder casts a real ray, driving forwards stops where the robot's body first touches a wall, and two wheel speeds produce the arc they really would produce. Nothing is special-cased to make a lesson come out right, and the simulator is checked against the same geometry computed a second way.

Best after the Python track. No robot to buy — the room is on the screen.

How it starts

A robot is only three things: sensors to notice the world, motors to move, and a brain to decide. You are the brain. Bolt lives in a room two metres across. Everything is measured in centimetres. Press the button under the room and watch.

The full Robots syllabus

8 units and 32 lessons, in the order they are played. Each unit has a page of its own with every explanation in it, the code samples and what they print, and a few questions to try.

Unit 1: Wake Up

Sensors, a brain, and two wheels

  1. First Orders
  2. Left and Right
  3. Sense, Think, Act
  4. The Long Way Round

Unit 2: Straight Lines

Getting there, and getting back

  1. There and Back
  2. The Square
  3. Angles That Add Up
  4. The Zigzag Run

Unit 3: Do It Again

One loop instead of four copies

  1. Four Times
  2. Polygons
  3. The Loop Counts
  4. Lap of the Lab

Unit 4: Senses

Numbers that come from the real world

  1. The Beam
  2. Both Sides
  3. Bump
  4. Measure the Room

Unit 5: Decisions

Programs that look before they leap

  1. If
  2. Else
  3. Three Ways
  4. The Junction

Unit 6: Loops That Watch

Keep going until something changes

  1. While
  2. Until You Get There
  3. Round the Edge
  4. The Maze

Unit 7: Wheels

Two motors, and how to ease off

  1. Two Motors
  2. Curves
  3. Easing Off
  4. Docking

Unit 8: Missions

Fetch, carry, and write the plan once

  1. Pick It Up
  2. Deliver
  3. Write It Once
  4. The Warehouse

Other things to learn

Start learning — units 1–2 are free