Category Events - United States, Mars (PA) Saturday, April 21 9 am - 12 pm $10 - Open Play and Painting $3 Per Adult Wishing to Paint Pre-registration encouraged. Walk-ins welcome! We’ll supply the rocks and paint! Come play and paint unlimited rocks any time from 9 am - 12 pm. Take your rocks home and place them around your community, spreading, Springtime cheer!