Make yourself at home.
Personalize your learning and Lalu’s voice. Settings are saved only on this browser and device.
Lalu’s voice
Your device’s own voices, with a little personality.
Read lesson explanations and guidance aloud.
Styles approximate a mood using pitch, not a promised named voice. Results vary; some devices ignore pitch adjustments.
Your daily goal
One activity is a valid completed checkpoint. Pick a goal that fits your day.
Appearance
Check your learning setup
Run real local checks for curriculum answers, XP guards, storage read-back, JavaScript examples, error handling, and the sandbox time limit. Your learning progress is not changed. Voice playback still needs a manual preview on your device.
Progress, preferences, and saved Code Lab drafts use local browser storage. Clearing site data or switching devices will not preserve them. There is no account, cloud sync, connected AI service, or remote code execution service.