Metra Delays. Track construction could cause delays up to 30 minutes behind schedule today and tomorrow.

Barb & Dan’s Road Ride. A 25-mile fitness bike ride. Everyone stays together. Leaves GoodSpeed Cycles, 2125 W. 183rd St., every Saturday (weather permitting) at 8 a.m. Returns before 10 a.m. Pace dictated by the riders who show up. Explore our local streets and trail system with Barb & Dan Lawler.

Off-Leash Ride. A nine-mile bike ride at about a 9-to-10 mph pace every Saturday. Route includes Butterfield Creek bike path, Rovers Run and Izaak Walton Preserve. Starts at 8:30 a.m. from GoodSpeed Cycles, 2125 W. 183rd St. in Homewood. Ends back at the shop about 9:30 a.m. for donuts. Kid trailers welcome.

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.