Bring binoculars and reclining lawn chairs to look at the spring night sky with a volunteer astronomer. A 13-inch telescope will also be available. Dress for the weather. A video will be shown if the skies are cloudy. Reservations are required.
Admission is charged.
Lake Katherine Nature Preserve holds a Campfire and Hayride at 7 p.m. Take a hayride then sit around the campfire to hear stories, enjoy sing-alongs, roast marshmallows or take night hikes. 7402 W. Lake Katherine Dr., Palos Heights. Navy Pier presents the Bayer Giant Garden on display at the Compass Rose West from 10 a.m. to 6 p.m. This oversized garden is a hands-on exhibit that brings what is below the ground to the surface for all to see. 600 E. Grand Ave., Chicago.