Stu invents the "Pickles Voice Frequency Modulator 5000", a microphone that distorts voices. Angelica's distorted voice sounds exactly like Charlotte's. While the Stu, Didi & Chazz are away at a whicker seminar, and advantage of the mike, and the phone's speed-dial function, by placing orders for sweets from Zippy's Deli, and by tricking the other grownups in believing that a surprise birthday party for Angelica is being organized. (thetvdb.com)