There is no better way to learn electronics and robots than building and programming your own Arduino robots. How To Mechatronics has shared a video that shows what it takes to build your own Arduino robotic arm with mecnaum wheels.
This robot features a 3D printed robotic arm. You can control it with a custom-built Android application. You can use the Save button to save the positions of the motors for each step. The files and codes are available here.