What: Help remove litter and trim trails by joining members of the Forest Preserve District of DuPage County and volunteers of all ages during "Random Acts of Kindness" workday.

http://www.dupageforest.com/Conservation/ForestPreserves/Hidden_Lake.html

When/where: 9 a.m. to noon Saturday in Hidden Lake Forest Preserve, Illinois Highway 53 south of Butterfield Road, Glen Ellyn.

How much: Free. Reservations and waivers are required. Call 630-933-7681.