Lend your time and a helping hand to this tree restoration project alongside community members of all ages. Dedicate your afternoon to some quality retail therapy, and peruse art, jewelry, food and more from over 40 local vendors. Boulder litter clean up9:30 a.m. to 1 p.m., Saturday, April 26, PDQ, 5200 Manhattan Circle, Boulder. Drop-in Figure Drawing6:30-8:30 p.m. Tuesday, April 29, NoBo Art Center, 4929 Broadway, Unit E, Boulder. $25Swing by the NoBo Art Center in Boulder for this weekly session of facilitated, uninstructed figure drawing with a nude fine arts model.