Thank you for viewing. This is a set of the Type 923 Doctor Yellow, N700A, and a 16-piece puzzle mat. I am selling these as I no longer have the opportunity to use them. The train bodies have been tested and are in working order. The batteries will be removed before shipping, so you will need one AAA battery to use them. I haven't played with them much, but please understand that these are used items before considering a purchase. To avoid any problems, please refrain from purchasing if you are looking for a perfect item. If you have any questions, please feel free to comment. Thank you.