Help mosaic some unique "stepping stones" that will someday be added as an artistic element to the new Playscape! *(limited supply of stepping stones available - please call the Corps office to register for the activity.) At 1 pm, Visitor's Center. Programs are free of charge. Outdoor activities may be cancelled if raining or inclement weather. For more information/ to register, contact the Corps of Engineers office at (641) 828-7522 or (641) 628-8690.