These are projects I am doing with the Adafruit PyRuler. It's essentially a Trinket M0, with an additional 4 large touch sensors and single-color LEDs hard-wired, built into a 6x1 inch PCB that is etched with standard and metric ruler graduations on the front, and a surface mount PCB reference chart on the back.
Adafruit Product page for PyRuler CircuitPython page for PyRuler CircuitPython Firmware Archive for PyRuler CircuitPython Library Bundle.