This is vintage 1970s Train cake toppers that have holes on the top of each train and are also wired together.

 You can put a candle in each train car.

 Made by M.G. Inc. Japan with original sticker on bottom. 

They are Hand painted on ceramic. 

What a fun unique way to dress up any occasion cake . 

Great gift for a cake decorator as well !

 Please refer to above photos for closer details and please ask any questions.