Imagine a South Dakota of lush tropical forests, sandy beaches and warm seas. Just watch out for the Tyrannosaurus Rex roaming those forests! Welcome to Mesozoic Era South Dakota of 150 to 66 million years ago. Visitors can create their own mini tropical South Dakota terrarium with sand, small dinosaurs and greenery. All supplies are provided and children must be accompanied by an adult. Information about Mesozoic South Dakota will be shared by PowerPoint running on a continuous loop throughout the event. Admission to the museum galleries is also free during event hours.