A little robot. A big discovery.

What will your robot do?

Make a prediction, try a move, and see what changes.

Runs locally · no account

Local physics experimentReady

Target Observed path2D arm · no collisions

Simulation time0.00 s

Distance to star—

Tip speed0.00 m/s

02 / Your discovery

Watch. Wonder. Try again.

Choose your prediction, then try the move. You can pause and advance one small step at a time.

The star shows the tip position requested by your two joint targets.

The dotted trail shows positions calculated by the physics engine.

Try changing just one thing. Does your prediction change?

Peek inside the robot

Shoulder angle: —
Elbow angle: —
Mechanical energy: —

A custom two-link dynamics engine calculates gravity, inertia, motor torque and damping. Targets are controller settings, not mechanical joint stops.

This is a local research model. It has no connection to a physical robot. Lesson feedback uses measured simulation values and simple rules, with no AI service.