Meet the Dobot: a cool Arduino-powered robotic arm for makers, educators, and students. This 4-axis robot arm can be controlled in a variety of ways, including your mobile device, voice, and gestures. It can draw, write, grab things, and perform other tasks. The robot does not make a lot of noise and can be programmed using a a a visual interface.
Dobot has a max payload of 500g. It has an Arduino Mege2560 controller. Did we mention that it has Bluetooth? The above video shows what Dobot has to offer. More information is available on Kickstarter.