Homewood Public Works Open House. If you think learning about street resurfacing and water lines sounds boring, you’ve never seen kids delight from a ride in a bucket lift or getting to sit at the controls of an excavator and pretend to dig a trench. Kids love big machines, and public works has plenty of those. The event is from 10 a.m. to 1 p.m. Saturday, May 17, at 17755 Ashland Ave.

STEM Saturday. Homewood Science Center, 18022 Dixie Highway, will host its free weekly science play time for the whole family from 10 a.m. to 1 p.m. Play opportunities include Pixel Pegs, Nano, Early Math Counts Activities, Makerspace, Imagination Playground, Dinosaur Bones, LEGO Wall and more.

Chicago Knockouts Roller Derby. A Premier League bout between the Retro Rumblers and the Horrific Haunters will start at 8 p.m. in the Homewood Auditorium, 2010 Chestnut Road. Doors open at 7:15 p.m. Tickets are $15 online, $20 at the door. Trackside tickets are $20 and front row is $25. Accessible seating is available at no extra charge.

Barb & Dan’s Road Ride. Riders of all experience levels can join the group which leaves at 8 a.m. from GoodSpeed Cycle, 2125 183rd St. in Homewood. There is a no-drop group that rides about 20 miles and stronger riders sometimes go farther. Helmets required, daytime lights strongly recommended.

Off-leash Ride. A leisurely just-riding-around nine-mile ride every Saturday. Route includes Butterfield Creek bike path, Rovers Run and Izaak Walton Preserve. Starts at GoodSpeed Cycles, 2125 183rd St. at 8:30 a.m. sharp, ends back at the shop 9:45ish for donuts.

Metra Delays. Trains could be delayed 30 minutes today and tomorrow because of track construction. Please listen to announcements for any platform changes. For additional information visit metra.com/constructionnotices.