Back in the old days, when MTU first started, it offered education in primarily two fields. One was forestry, and the other Engineering. Back then, most engineers were associated with Locomotives - hence the nickname "toot". The nickname twig now becomes obvious.
They have a very good metallurgy dept. also. However, it almost sounds like your son is better with his hands doing things than with his neurons and a calculator. So... what would he rather do? Push a mouse and pencil, or get his hands "dirty"?
The reason I ask, is because no matter what you would like him to do/study, he will most likely remain on the path that he wants to be on. Then again, if money is not a great issue, the first year is an exploratory year anyway...lots of remedial stuff. That first year he should spend investigating what each field is about. He might be able to sit in on a few lectures - see if it grabs his fancy or not.
I want to stress again the point that if he does not like where he is at, and what he is supposed to be doing there, that he will find ample opportunity for distractions. The social fraternity I-Tappa-Kegga comes to mind.