Exodus 25:1 through 28:43
Making the tabernacle and all of its furnishings. There are models of these that I'd love to do with my kids sometime. Here is a link with some of them. There is also a free paper version here. You can also see pictures of a replica online at here. There is an time-intense relication a church group of children did here.
I am not going to dive in deep with all of this other than to say that I love the fact that God is a God of details! I believe that is how He is with our lives. He is concerned with EVERY detail. He is concerned with each of our feelings..no matter how small or trivial to others.