Using this 2 - car set is easy. Just take the cars out of the box and place them on your HO scale track. When handling the cars, be gentle as they're fragile, especially the brass parts. To keep the set in great condition, store it in a dry place away from direct sunlight. You can use a soft, dry cloth to clean the cars occasionally. If you notice any loose parts, you can use the spare parts included in the set. When shipping, we've packed it well, but still handle it carefully when it arrives. And remember, if you're not satisfied, you can return it within 30 days.