Meet the UBTECH Jimu Inventor Robot Kit: another educational bot that connects to your iOS or Android device and teaches your kids a thing or two about technology. You can assemble different characters with this kit. You get 16 digital servo motors, battery pack, power battery, 675 interlocking parts, and everything else you need to get started.
The companion app provides you with building instructions with 360 degree pan, tilt, and zoom capability. These robots are expandable with additional servos and character kits. Costs under $400 at this time.