googlecreativelab/chrome-music-lab ? reverse-engineered prompt

Build me a playful music learning website inspired by Chrome Music Lab, with a few interactive experiments that help people explore how music works.

I want each experiment to feel simple, visual, and fun, something kids or beginners could use without reading instructions. Include a few different music tools like making melodies, chords, harmonics, a piano style grid, and a sound visualizer or spectrogram. The page should work in the browser and let people click, tap, and drag to create sounds in real time.

Use the web audio features available in modern browsers, and keep the experience smooth and polished. Make it easy to switch between experiments, and make each one feel like a little standalone toy. If you need to look up current docs online, go ahead. Focus on making it feel like a real Chrome Music Lab style demo that people can explore and learn from right away.