Here is another kit that can teach young learners more about coding and technology concepts. The WLkata 6-Axis Mini Robotic Arm Kit can be controlled with your phone. It is based on open hardware. It has an open API too. It has 6+1 DOF, payload capacity of 250ga and WiFi/Bluetooth connectivity.
This robot has an Arduino2560 controller. It has an ABS and aluminum alloy construction. You can control it with the WLKATA Studio. More info is available here.