Music for Martians: Build and Play a Theremin Instrument | Science Project
Theremin World - Theremin Models
Video and Schematic Breakdown: MadLab Junior Theremin - DIY Audio Circuits
MicroKits Theremin Electronics Kit | Educational Electronic Music STEAM/STEM Kits for Kids or Adults | No Tools Needed Easy to Build Breadboard Kit - Walmart.com
FabFM Radio Kit - KIT-11043 - SparkFun Electronics