Below is the box in which the pieces are packed.
The Legos are organized into several bags. The large bags are numbered. Based on our experience with Lego products, there seem to be two approaches: put pieces of similar size and color in the same bag, or put pieces needed for the same steps in the same bag. The former is probably easier and cheaper for the company. The latter is much more useful for the consumer, and likely for the people writing the instruction books. This product groups pieces that belong in the same steps. So we are assembling it one bag at a time. There are 5 of these large numbered bags, plus several smaller ones that don't seem to be numbered.
This is the signboard with the first of the Beatles in place.
Here is the top side of the Yellow Submarine at the end of Session 1. Due to the narrow, rounded bottom of the model, it tends to rock. That makes this a four-handed project instead of a two-handed one. Many of the steps really need one person to hold the model steady while another person positions the new piece.
Here is the bottom of the Yellow Submarine at the end of Session 1. You can see the rounded bottom in this view. The model uses many uniquely shaped pieces.