Here is another STEM kit with easy to use components that allows your kids to work on their own inventions and control them from a smartphone. The Gizmos & Gadgets Kit comes with components color-coded by function. They easily snap together and require no soldering.
Your kids can use this to build a Bluetooth controlled rover, prank box, and many other fun inventions. The kit includes DC motors, light sensor, servo, fan, light sensor, Bluetooth modules, and other necessary components. An invention guidebook is also included.[where to get it]