Things to do on the grounds:

Watch wheat crop harvest using both steam and gasoline-powered equipment
See threshing machines at work
View the modern John Deere equipment display from Martin Deerline.
Watch tractor starting and driving demonstrations
Watch swathing, combining, ploughing and stooking demonstrations
Ride the tractor shuttle between the main building and the Aviation Display Hangar
Play carnival games and win prizes in the Family Fun Zone
Visit your animal friends in the petting zoo