In 2000 Theo & Esther Slingerland started the 1st Cornmaze in Alberta on the RobinPick Berry Farm north of Lethbridge. Every year Theo designs a new Cornmaze and carves it into the Cornfield. Over the years the Slingerlands added a kids maze, petting zoo, picnic shelters, hayrides, a cow train, pumpkins, a pumpkin slingshot, a bale maze and a playground.