Goal: To take input from .3-16v to .3-2.0v

Ideas:

Use a resistor-based voltage divider that divides by eight, reducing 16 volts to 2 volts.
- Using precision surface-mount resistors on a PCB with a heat-sink
  - Use body of probe as heatsink, if conductive enough.
Use a 2.2v zener diode with a voltage dependent switch to enable the measuring of voltages less than 2.4v(.3*8)
- This method would require the child to recognize high(above 1.9v) and low(below 1.9v) voltages, and to adjust a switch accordingly.