K.G.
We just moved here, but we had a great time at Minnetonka Orchards! Here is their website: http://www.minnetonkaorchards.com/.
You have to either take a hay ride or walk down the trail a bit to get to the play area, but it is really great. They have a hay mountain, a wooden train play area, a swingset, petting zoo, tractors, corn maze, apple cider donuts... it's very cool.