May be my only choice. Teaching mechanics to little girls that only worry about hair, make up, clothes and cute boys is a task for experts, but I will try.
The temperature sensor has a resistor and adding another resistor in a separate line and to an alarm would work in an event of overheating, but current will always be transmitting to the alarm with more or less voltage and it will be sounding constantly from just a bit to lauder, depending on the voltage. This could be an annoying distraction.