Gather your family and friends, pack your blankets and picnic baskets, and find your perfect spot in the Wilson Center’s backyard to celebrate National Collector Car Appreciation Day! Enjoy a free concert by Milwaukee’s own The Rockin’ Robins featuring the music of the ’50s and ’60s, as well as an opportunity to look at hundreds of the area’s best hot rods, classic cars, custom cars, antique cars, sports cars, and classic motorcycles.