Drop-in Art - City Treehouse Date: 04/13/13 Hours: 11am-1pm Ages: TOD Price: Free with play area visit; prices vary, check online for all options Address: 129A W. 20th St. - 212-255-2050 Chelsea, NY 10011 citytreehouse.com Description: Play around the water table then join Courtney in the downstairs art studio for fun and easy art projects. Make something different every month using a variety of materials, including paint, crayons, recycled paper products, clay, glitter, and more.