I wonder if I should get such a hardware to program it and make some fun.
https://www.youtube.com/watch?v=IrmOFbSAW2Y
It is a desktop-based robotic arm kit, and it is open source.It is compatible with Arduino, and gets stepper motors as actuators, meanwhile, a variety of control methods makes it easier to control. Its arm made by aluminium alloy plate on electric spark eroding and CNC processing. So it has excellent accuracy and flexibility.