Sidewalk chalk isn’t just for kids, anymore. This Labor Day weekend, Sacramentans can get in touch with their inner child at the 20th annual “Chalk it Up! to Sacramento” chalk art festival in Fremont Park. Saturday through Monday, 200 professional artists will be on their hands and knees, creating two-by-four masterpieces on the sidewalk. Non-professionals can purchase their own squares for $10, which includes a box of chalk. A communal space with communal chalk on the interior of the park will also be available for kids and adults alike to chalk it up. Darby Flynn, president of Chalk it Up! said this type of event is special to Sacramento. “We want to make sure that our arts remain vi