Old MacDonald is a musical, farm-themed educational game designed for kids ages 1 and up. Based on the time-honored song ("Old MacDonald had a farm, e-i-e-i-o!"), kids choose from a spinning touch-screen wheel of 21 different animals, including a duck, cow, beaver, octopus, and more. As each animal is selected, you hear its name spoken aloud, along with a matching animal sound effect. You then touch the animal to see if it "belongs" on a McDonald's archetypal farm.
Many of them don't belong, and the narrator will let you know ("A fox? A fox will eat all the chickens on a farm!" "A dinosaur? Dinosaurs are extinct!") before the animal is comically pulled away by a tractor or booted by a donkey--or just blows up in a cloud of smoke. When an animal does belong on the farm, you hear a complete verse of the "Old MacDonald" song, and then get to drag and drop the animal into its appropriate location (the horse in the stable, the pig in the mud, etc.). When you successfully sort all the animals, Old MacDonald himself comes out to dance a happy jig.
The game is fun on several levels, although it will appeal primarily to older toddlers. Even smaller children will like the animal noises (especially a rooster on the farm that will cock-a-doodle-doo ad infinitum), while older kids will be more interested in the animal sorting. Unfortunately, the interface isn't as good as it could be: the touch-screen wheel is peculiarly fussy (difficult for even an adult to turn precisely), the audio cues that direct the action don't always sync up (for example, you hear "Go ahead, spin the wheel!" while the animation is still loading), and the game can freeze up during calls and doesn't save your progress if you exit the app. Given the limited selection of toddler apps currently available on the iPhone and iPod Touch, though, Old MacDonald can still be a good choice if you're looking for more diversions for a wee one.