I visited to Cup Noodle Museum with my wife and my son. It is located Yokohama. Its admission fee is 500 yen ($4.81 €3.52) for adults, no charge for under 15 kids. You can see the history of Cup Noodle (instant noodle in a cup. next image) and the story of its inventor Mr. Momofuku Ando.
There is also a workshop of making a Cup Noodle with your own designed package.
My son bought a stuffed animal of Chikin Ramen Bird for 200 yen.