Cool Timer will tell your kids when their time is up, when your cake is done, or when you need to take a break, etc. It can even wake you up in the morning. This program originated from a need for a simple but effective way for me to regulate my kids' time on the computer. It can play any wav, mp3, or midi file OR any of several built-in sounds for an alarm. The interface is fully customizable with many different color options for its different features.