open-source 0.5 m humanoid
Train Stanford ToddlerBot with reinforcement learning
Stanford's open-source, 3D-printed humanoid with legs, waist, arms and neck. kualia uses the MuJoCo Menagerie position-controlled model that starts from its home pose.
- Actuators
- 30
- First skill
- ~5M steps
- Size
- ≈50 cm
- License
- MIT
Tricks people teach Stanford ToddlerBot
How it works
- Describe the trick in a sentence and pick Stanford ToddlerBot.
- alia, kualia's assistant, writes the Gymnasium task — reward, success, failure and world objects — and runs 13 automatic checks.
- Train with PPO on kualia's servers and watch every checkpoint replayed in 3D in your browser.
- Export a deterministic ONNX policy and run it on the robot with onnxruntime.
From your coding agent
Working in Claude Code, Cursor or Codex? Connect kualia as an MCP server with a personal API key (Settings → API keys), then ask: “Train my Stanford ToddlerBot to stand and balance with kualia.”
claude mcp add --transport http kualia https://kualia.ai/api/mcp \ --header "Authorization: Bearer $KUALIA_API_KEY"Coding-agent guide →
Questions
Can I train Stanford ToddlerBot without writing code?
Yes. Pick Stanford ToddlerBot in kualia, describe the trick in a sentence, and kualia's assistant writes the Gymnasium task (reward, success, failure and any world objects), runs 13 automatic checks and trains a PPO policy in MuJoCo.
How many training steps does Stanford ToddlerBot need?
Roughly ~5M steps for a first real skill with PPO. Start with a 10,000-step first try to check the task before spending more.
Can I run the trained policy on the real Stanford ToddlerBot?
kualia exports a deterministic ONNX policy with observation normalisation baked in, plus metadata describing observations and action scaling. You run it with onnxruntime on the robot's computer. Test carefully: simulation and hardware differ.
Can my coding agent use kualia for Stanford ToddlerBot?
Yes. kualia is a remote MCP server at https://kualia.ai/api/mcp. Add it to Claude Code, Cursor or Codex with a personal API key and ask the agent to train Stanford ToddlerBot.
More tiny & maker robots
Stanford ToddlerBot model by Stanford, MIT; used unchanged except for a floor, a standing pose and actuator centring where noted. kualia is not affiliated with Stanford.