A friend of mine just asked me what the best tablet was for her little one. If an iPad mini is out of your price range, check out the LeapFrog LeapPad Explorer Learning Tablet. These sell out very quickly, and rarely go on sale. They still have them in stock at both Walmart and Amazon.com.
Walmart: LeapPad 2 Learning System, pink $99
Amazon.com: LeapPad 2 Learning System, green $99
LeapFrog.com will have 25% off most of their items starting 11/25 and you can also get an amazing deal at Amazon for the LeapPad 1 Explorer at $59.97