The Kiewit Luminarium, 345 Riverfront Dr., Omaha, is a hands-on science center at Lewis & Clark Landing on The RiverFront.

Hours: Tuesday–Sunday 10–5, Wednesday to 7; closed Mondays except in summer, on holidays and during school breaks. Admission: adults $18, ages 4–17 $13, 3 and under free. Phone: 402-502-3366.