This year, the Nature Center Preschool at the South Shore Natural Science Center in Norwell was no exception. The school’s 72 slots were filled in March, and the waiting list was long.

Week-long camps at both the Ann Arbor Hands-On Museum, 220 E. Ann St., and the Leslie Science and Nature Center, 1831 Traver Road, are offered from Monday, June 12, to Friday, Sept. 1.