I think that the little NAO Robot is a really cool toy that would be a lot of fun to play with. We talked about the NAO robot earlier this month and the thing is still being developed and tweaked. A company called Aldebaran robotics has developed a really cool charger for the NAO that the robot can connect itself to when charging is needed.
The charger appears to be magnetic sort of like a MacBook charger is. The robot side steps up to the charger port, lines itself up and walks backwards until the magnetic power coupler attaches. The bot the steps forward a bit with the retracting cord trailing along behind it and sits down.
It's so cool to watch the NAO sit down, it looks just like a human with the movements it uses to sit on its little robot buttocks. When the bot is done charging it stands up, reaches behind its back and flicks the magnetic charger. That charger then retracts and the bot is ready to move on about its robotic business. Check out the video below to see it in action.