Robot Arm

This is Luigi’s project, for about 3 days already.
This is the Mindstorms Robot Arm. The function of this robot is to pick something up (like a pen), and to put it back down in another place. There are no step-by-step instructions, only key frames. So some parts Luigi had to improvise. I think even the programming module for this is not complete, because up to now, it doesn’t work as correctly as it should.

He has built it 2 times already, and daddy has been helping him. But it’s not yet perfect. Miko is the tester, so he’s in charge of the remote.