Community Fishing Derby: 9 a.m. Saturday, Freeman and Mumford roads, Hoffman Estates. Prizes awarded every 15 minutes; $1,000 Cabela’s gift card. $5.

Touch-A-Truck: 9 a.m. Saturday, Hanover Park Metra Station, 1975 W. Lake. Police, fire, public works vehicles. Free.

4th Annual Flea Market & Craft Fair: 9 a.m. to 3 p.m. Saturday, First United Methodist Church of Des Plaines, 668 Graceland Ave. Info: (847) 827-5561 or methodistmissions2@gmail.com.

Polyglots (German speaking) Toastmasters: 9:30 a.m. Saturday, Oakton Arms, 1660 Oakton Place, Des Plaines. Info: www.polyglotstoastmasters.org or andrew.weiler.uiuc@gmail.com. Free.

Why We Sing!: 4 and 7 p.m. Saturday, Southminster Presbyterian Church, 916 E. Central, Arlington Heights. Northwest Choral Society culminates its 2015-16 performance season and its Golden Jubilee celebration with selections from its 50 years of end-of-season June concerts. $20-$25.

Checkpoint Tire Center 4th Annual Benefit Car Show: 9 a.m. to 3:30 p.m. Sunday, 723 W. Dundee Road, Wheeling. $15 entry fee donated to St. Jude Medical Center. Free to spectators. Show vehicle registration from 8 a.m. to noon includes goody bag, raffle ticket, voucher for one hot dog and drink. Music, emcee, concessions. Info: (847) 541-2122.

Explore the Forest: Noon Sunday, Crabtree Nature Center, 3 Stover Road, Barrington. Climb a tree, touch a fish, check out the restoration equipment, pitch a tent, or try archery. Special activities at this Leave No Child Inside Event. Free.