You can add quite a few of the typical visible loads I found simply by clicking on the Plus (+) sign in the Properties Edit (?) dialog for the wagon in Session Edit mode. Choose from the extensive list of bulk commodities available.
Most are bulk-type loads as there are no handles/ attachments for individual product items/ units and liquid loads are obviously inappropriate.
Examples include: woodchips, coking coal, grains, (like barley & corn but not very convincing looking!) Ash bulk-SAP, etc., etc.
