Root is a new programmable robot for kids. Root can be used on a vertical magnetic whiteboard which is pretty neat. It can also draw with (and erase) whiteboard pens and has coloured LEDs and a piezo (tone) speaker.
As well as being able to draw, Root can sense and react to colours as it drives over them. As well as having its own sensors Root can make use of the sensors in the mobile device being used to program it. There's also an expansion port for future extensibility which can also be used by third parties.
Root can operate on a flat surface but it's the vertical operation that adds something a bit different. Here in the UK many whiteboards in classrooms are smart boards that you wouldn't be able to use Root on but there's often a small magnetic whiteboard and you can use Root with a portable whiteboard too.
Check out Root on Kickstarter.