The Construction Birthday Cake

It's birthday season around here and this time it is Big C's turn.I wont even try to top last year's Mater Cake. We know that construction is another big love, so off I went.Here Bob and the gang are right in the middle of a serious project. I don't think that there is an instructional video, but they should be able to get the job done.
They got stuck at the section with the 8 hole board but quickly managed to move on when they remembered that it is a G rated blog.