There's a pretty active dirt oval in Sangudo, they run stock cars, mini's, modifieds.
www.sangudospeedway.com If you've never watched dirt racing, don't confuse it with racing on pavement, it's fast, lot's of passing, cars go sideways through the corners. (brakes, who needs brakes??) A cheap, exciting evening out everyone will enjoy.
Also, the Reynolds museum in Wetaskiwin is not to be missed.