Originally developed for self-defense, tai chi has evolved into a graceful form of exercise that is now used to reduce stress and help increase flexibility and balance. There is a non-refundable fee of $20.00 due at registration. This program is for Adults only. Registration for Babylon patrons begins at the Circulation Desk Thursday, September 14.  Out of district residents may begin to register Thursday, September 28.  A valid library card is required for registration.  One person per library card.  No…