In this short workshop, learn how to use capacitive sensing to turn regular blocks of tofu into “piano keys” that play sounds when touched.

Here’s what you get

  • 2 hours of fun!
  • Wires
  • Resistors
  • Tofu (actually tau kwa, but “tofu” sounds nicer)
  • Passive buzzer


  • Desktop / laptop (Windows / Mac)
  • Scratch for Arduino (free, customised version will be made available for download)
  • Arduino IDE (free)
  • Arduino UNO or Arduino-compatible board
  • Breadboard

You can purchase an Arduino UNO and a breadboard from us separately if you need them.

Course length

2 hrs


No prior experience necessary. We’ll guide you along as you put together the code and circuit. Suitable for anyone aged 8 to 18. We offer differentiated tracks so more advanced participants don’t get bored and newbies don’t get lost.


Classes are being run at IDA Labs. Please check with us for upcoming classes.