Looking at the schematics of the Intel Edison mini breakout board, there are no pins for analog inputs, e.g. for reading state of a potentiometer.
For a hardware workshop based on the mini breakout board, I am thinking to discuss analog inputs. What circuit or breakout board would provide analog-to-digital conversion in a "cheap" way? What about power rails for the ADC? I2C on the Edison has 1.8V while system voltage can be higher but is not stable/accurate enough for ADC maybe?