THE HIPPODROME, 150 High St. N.E., Warren: Superhero Brunch, 10 a.m. and 1 p.m. Saturday, $20 adults and $26 for children. 330-219-9819.
METROPARKS FARM, 7574 Columbiana-Canfield Road, Canfield: Just Kidding Around, 3 to 5 p.m. Sunday. 330-533-7572.
MILL CREEK METROPARKS, Youngstown: Birding the Sanctuary walk, 8 a.m. Saturday, register by calling 330-740-7107; Garden Forum Spring Flower Show, noon to 5 p.m. Saturday and 10 a.m. to 5 p.m. Sunday, Fellows Riverside Gardens; iNaturalist Hike, 2 to 4 p.m. Sunday, meet at Ford Nature Center; Recreational Hike, 9 a.m. Wednesday, meet at MetroParks Bikeway trailhead at MetroParks Farm. 330-702-3000.
WARD BEECHER PLANETARIUM, Youngstown State University: "What Are Constellations?" 8 p.m. Friday and Saturday, free; "Wilbear's Adventure," 1 and 2:30 p.m. Saturday, free. 330-941-3616.
YOUNGSTOWN AIR RESERVE STATION, state Route 193, Vienna: Thunder Over the Valley Air Show, 9 a.m. to 5 p.m. Saturday and Sunday with opening ceremony at 11:30 a.m., free. 330-531-0120.
I-X CENTER, One I-X Center Drive, Cleveland: Rite Aid Marathon Health and Fitness Expo, 11 a.m. to 7 p.m. Friday and 10 a.m. to 6 p.m. Saturday.
THE TOONSEUM, 945 Liberty Ave., Pittsburgh: Little Golden Books Celebration, 4 to 7 p.m. Saturday, $25 per family (two adults and up to three children) and $5 for each additional child. 412-232-0199.
OH WOW! ROGER & GLORIA JONES CHILDREN'S CENTER FOR SCIENCE AND TECHNOLOGY, 11 W. Federal St., Youngstown: Hours are 10 a.m. to 6 p.m. Monday through Thursday, 10 a.m. to 4 p.m. Friday and Saturday and noon to 4 p.m. Sunday, $8 adults and children ages 2 and older, $7 senior citizens and veterans and free for children younger than 2 years old. 330-744-5914.
CARNEGIE SCIENCE CENTER, One Allegheny Ave., Pittsburgh: Hours are 10 a.m. to 7 p.m. Sunday through Thursday and 10 a.m. to 9 p.m. Friday and Saturday. 412-237-3400.
CHILDREN'S MUSEUM OF CLEVELAND, 10730 Euclid Ave., Cleveland: Hours are 10 a.m. to 5 p.m. daily; $6. 216-791-KIDS.