we made little tool belts with each boys name on them filled with tape measures, levels, safety goggles, screwdrivers... and they had cute little construction hats with their names on them. We even found cute cone shaped water bottles for the boys.
the table cloth was old construction plans with a paint bucket filled with hammers for the center piece. Each boy had a little project they were able to construct.
As party favors, we sent home mini "tool boxes" filled with goodies. we made them out of wooden boxes, spray painted red with drawer pulls on top.