This Sniff toy dog by Sara Johansson looks like a regular stuffed dog, but actually has lots of components inside to make it (arguably) smarter than a real dog. Or, at least, a squirrel.
The video illustrates what Sniff can do, including sniffing out RFID tags to instigate "activities" such as different behaviours and vibrations and melody games. I can't tell how well this works, but that little girl in the video looks like she's having the best time ever, so that's pretty cool. And Sniff is designed with sight-impaired children who have special needs in mind, which makes it even cooler.