Why at the end of the Parsha does it spend so much time and space detailing all the dedications of the various leaders of the various tribes. they were all exactly the same. The Torah should have detailed one, and then said in some way that each one brought his dedication on his appropriate day. Or something similar to that.
So why does it detail each one seperately?
I would suggest that this shows how important each individual is. Yes, they each gave the same thing, but each gave it seperately. Each one put his heart into his gift.
the Torah details each one because it wants to show us that the gift of each individual, the service of each individual, is important in its own right, and not just as part of the group.