Here is another affordable robot kit that teaches your kids the basics of coding and logical thinking. The Yahboom Micro:bit 5-in-1 Robot Car comes with 173 blocks, motors, servos, and everything you need to get started. You can control the robot using an iOS or Android device.
The Running:bit building block kit comes with an expansion board. You can program the car with a graphical user interface. The Super:bit expansion board can be connected to motors and servos. You can also add LEGO pieces for more interesting projects.