[MrForbes]

Sounds like a tough situation, although I've sort of been there in the earlier years. After a while at this, I've figured out that the reason that I keep coming back year after year is that I really enjoy the engineering process, and working with a team of students to design and build a robot in 6 weeks is about the most fun an engineer can have. And I let the students know that being part of the team, them letting me do stuff, is what keeps me coming back. I don't have any interest in sitting around watching other people do stuff.

As suggested, you all need to sit down and talk about your roles on the team, and the status of your engineering project (the robot). There are two weeks left, and a few teams have already demonstrated that you can build a robot in three days....but it takes a cooperative effort by everyone on the team. Let them know that you want the team to succeed, and you're concerned that if things keep going as they are, that won't happen.

Mentoring is a tough game.