I found this "Plarail Macaroni" at the "Plarail Shop Tokyo" located on Tokyo Character Street in Tokyo Station Ichibangai. The purchase price was 500 yen (tax included).
Plarail Macaroni
Plarail Macaroni is a macaroni (short pasta) in the shape of a train. It is made of durum wheat semolina and has a glutinous texture. The macaroni comes in a total of six different shapes. This is an original product from the Plarail Shop.Cooking method
Add 2 tablespoons of salt to at least 2 liters of boiling water per bag (150g (5.29oz)), and boil a little at a time. Boil for about 5 minutes. Add 2 tablespoons of salt and boil for about 5 minutes.You can eat it with sauce, in soup, or any other way you like. The sticky macaroni are all shaped like little trains, very cute! I'm sure your children will be happy to eat this.
Although it was not available when I visited, they also sell "Tomica Macaroni" in the shape of a car. Why don't you pick one up when you see it?