New in the you’ve-got-to-be-kidding department: spas for kids. Parents requested it, claims management at the Hyatt Regency Hill Country Resort near San Antonio. The just-opened SPAhhhT Youth Spa dispenses henna tattoos, hairdos, and nail services to the 17-and-under set (800-233-1234, www.hyatt.com). At the tony Bacara Resort & Spa in Santa Barbara, teens can get personal training sessions and Skin Care 101 classes (805-968-0100, www.bacararesort.com). And Grand Velas, near Puerto Vallarta in Mexico, offers poolside treatments, allowing parents to supervise from their chaises (877-398-2784, www.grandvelas.com). Imagine, sweet 16 and never been stressed.