Hand Following Robotic Arm

Young humanoid, seeing another video online, wanted to make a hand-following arm.  Young humanoid used a compass sensor to track his hand's rotation, and an acceleration sensor to track his hand's tilt.  A touch sensor activated the claw.

The system worked marvelously.  Using a programming feature from another website, the robotic arm could easily track young humanoid's and was even precise enough to pick up a ball.