Trivet Trivia Time
Here is a fascinating project from MIT:

This project includes an understanding of oven cooking practices in an oven mitt by designing it to remark verbally on its temperature. The Talking Trivet uses a thermoresistor to remark on the temperature of foods and containers which are placed on it. For example, it exclaims "FIRE!" when left on a surface ove 600 degrees, informs you that the food "Needs rewarming." or affirms that the food is "Hot and ready to eat!". In addition, it sets an automatic timer for cooking which is based on the temperature of the oven. Therefore, a 275 degree oven exclaims that the food should be checked in 40 minutes, whiles a 500 degree oven recommends that it should be tested in 10 minutes.