Here is another robot that teaches your kids coding. The Stray Snail 4WD Arduino Robot comes with iOS and Android control. This kit comes with 4 motors, 2 light sensors, a LED module, 1 x infinity tunnel, a buzzer, and various other sensors. It also has a Bluetooth module, OLED screen, and expansion board.
This robot can trace light, track lines, and avoid obstacles. It is ready for C and graphical coding.