Here is another robotics kit that teaches your kids a thing or two about engineering concepts. The Circuit Cubes Gears Go Garage Kit comes with over 200 parts and instructions to build 16 different vehicles. You can control the Mountaineer, Scout, Traction and other vehicles with your smartphone.
This STEM kit is made for kids 8 to 12 years old. It ships with a Bluetooth battery cube, RGB light cube, motor, and other cubes to let you add power, light, and motion to your builds. More info is available here.