These came out of a new set.

The North Pole Express Christmas Train Locomotive & Coal Cart Replacement by EZTEC is a 1:22.5 scale plastic train set designed for ages 7 and up. This black train features a battery power supply and is a great addition for young train enthusiasts. Made in China, this toy is perfect for children ages 5-7 to enjoy a fun and festive Christmas train experience. The locomotive and coal cart are not modified items, staying true to the original design of the North Pole Express train set.