Hide-and-Seek with a Pager

My five children and I were playing hide-and-seek one evening. With the lights turned off in the house, the kids scattered to hide, and I was "it." After a few minutes, I was able to locate all of them.
When it was my turn to hide, they searched high and low but couldn't find me. Finally, one of my sons got a bright idea. He went to the phone and dialed; they found me immediately because my pager started beeping.