How a neural network moves information

Watch

Watch the existing 3Blue1Brown introduction through 13:32, before the compact vector and matrix notation. Focus on what the circles and connections do; the demo takes each part slowly.

Then explore

Start with one input and one output. Change a weight or bias, predict the result, and watch the number move forward. Each step adds one new idea before you build your own network.

The explanations and activities stay beside the demo. Open Notice after trying an activity to check your prediction.