Sandcastles is a hands-on museum with over 30 interactive exhibits. Summer hours start June 1st! Summer hours are Mon-Sat from 9:30 am - 5:00 pm and Sunday 12-4 pm. ( our off season hours are 9:30-1 Friday, 9:30-3:00 Saturday and noon until 4:00 on Sunday.) Exhibits include a real airplane a hospital baby nursery, a vet center, the Badger Play ship, grocery store, climbing wall and more! Party room available. Special activities : Meijer Messy Mondays 11:00-1:00 pm. Fun Fridays at 11 am. Join us for learning and play. See our website for a a full calendar of daily events and special educational programs.