All kits comprise a bag of load material, such as coal or sand, plus sections of board that are cut to size to fit the desired wagon. The modeller, using a PVA adhesive, secures the materials on the cut boards and places the load inside the wagon for instant effect. The additional benefit, apart from the realism, is that some valuable weight is added to what might otherwise be a very light vehicle.

The OO/HO scale kits contain enough material for up to 3 wagons. Full instructions are provided in the packs.