A scavenger hunt! Participants will look for different color 3-D printed trilobites hiding in the outdoor classroom. Find one of each color and get a movable trilobite model. Naturalist at Heart volunteer Bob Thesier will talk about these extinction marine critters and how they lived. Your $2 program fee is covered by a grant from the Falls of the Ohio Foundation. Meets in the outdoor classroom, located across the parking lot from the interpretive center.