If you want your kids to see a real farm, stop by the Deep Creek visitor center for the brochure called Visit Our Working Farms, Share Our Heritage, which lists farms that welcome visitors.
At Cove-Run Farms, 596 Griffith Rd., Accident (tel. 301/746-6111), there's a corn maze built into 10 acres -- Maryland's largest such autumn attraction. The corn is tall and the paths are tricky, but it's fun to hear the kids squeal as they make their way through. It's open mid-August through October, Friday from noon to 10pm, Saturday from noon to 9pm, and Sunday from 2 to 6pm.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.