Tots can celebrate a relatively spook-free Halloween at Apple Seeds' UWS location, which opens its doors to nonmembers for the event. Partygoers will hear tunes by Songs for Seeds, enjoy glow-in-the-dark activities in the indoor playspace, make a craft project with the New Victory Theater and Babyganics and catch a cool performance from Big Apple Circus. Guests will snag a free dental hygiene kit from Dr. Adam Silevitch and fill up on pizza and munchies provided by Bitsy's Brainfood and GoGo SqueeZ. RSVP is required; call 212-792-7591. Ages newborn to 5 years.