NEST is a kid-centric, parent-friendly enrichment center and indoor playground located in the heart of Center City Philadelphia. They offer a wide variety of classes including cooking, yoga, art, music, karate, soccer, ballet, movement and more. Classes range from infant to age 7. Winter 2011 class schedule can be found here. http://www.nestphilly.com/assets/pdf/schedule_winter2012.pdf. Pricing varies, membership available which includes benefits such as open play time, class discounts, and discounts in the NEST boutique.