You may laugh ... but i think this is a fantastic idea for anyone who has children. This Sally The Safety Pig Water Temperature Gauge (what a name!) has been reduced to just £8.49 delivered from Play.com.
Description: Sally the Safety Pig is an early warning device for water temperature. Simply set Sally to your desired temperature, place her tail in the tub or any water basin and fill with water. When the water temperature reaches or exceeds the temperature set, Sally squeals to alert you.