Several hundred games, interactivity and a cool pen that talks to you but comes with a headphone jack to help parents maintain their sanity! Oregon Scientific is on to something with Alex and their Smart Anatomy interactive educational toy.
To pick one up for your child, you can check out: http://store.oregonscientific.com/us/kids-learning-fun/smart-anatomy.html
Disclosure: Oregon Scientific provided us with a sample for the purpose of this review.