Here is another robot kit designed to get your kids familiar with electronics and coding concepts. The Microduino Cube Robot Car comes with Bluetooth and app control. It is Arduino compatible too. This cube car can be controlled using the Microduino mRobots app.
The kit comes with a Microduino Core, Bluetooth module, motors, mounts, and everything you need to get started. It is available for under $85 at this time.[where to get it]