← All tools

How does a machine make a decision?

Light-Up Neuron

Build, train and test an artificial neuron and a small neural network, with real maths you can see and play with.

Working prototype
Who it is forGrades 6–9 (ages 11–14)
SkillsNeurons · Weights · Training
TypeAI explorer
Loading the tool… Open in new tab

Before you begin

You’ll guess what might happen, make a choice, test it, and explain what changed. Wrong guesses are allowed (and encouraged).

How to use

  1. Read the challenge.
  2. Build or choose a model.
  3. Test it.
  4. Improve it.
  5. Explain why your final choice works.

Learning goals

  • Explain how inputs, weights and a bias add up to a decision.
  • Train a neuron and watch its mistakes shrink.
  • See how neurons join up into a small network.

Think again

What surprised you? What are you still not sure about? What would you test next?

About this prototype

Version 1, a working prototype. It hasn’t been tested with classes yet, so I’m not claiming any learning results.

Privacy

No sign-in is needed. The tool runs in your browser, and anything you type stays on your device. Please do not enter a child’s full name.