Please send a catalog.Designer Flo Waters responds:"I'd be delighted...but please understand that all of my fountains are custom-made."Soon the fountain project takes on a life of its own, one chronicled in letters, postcards, memos, transcripts, and official documents. The school board president is up in arms. So is Dee Eel, of the water-supply company. A scandal is brewing, and Mr. Sam N.'s fifth grade class is turning up a host of hilarious secrets buried deep beneath the fountain.