Meet the SoundScribe: a Bluetooth connected Chladni Plate that combines with your smartphone to let you experiment with different sound frequencies to generate unique cymatic patterns. This is also a regular speaker, so you can play regular music through it.
The SoundScribe Chladni Plate comes with a 12″ carbon fiber plate. It has Bluetooth 4.0 connectivity but also supports older devices through a 3.5mm auxiliary port. You can use tone generating apps for iOS and Android to experiment.