Miniature Toy Submarine actually dives and resurfaces. use over and over again. Just like the ones that Kelloggs Cereal used to give away as a prize in the cereal box.
It's cool but even though it's been over 60 years I seem to remember the sub being larger. It brings back a bit of nostalgia but not the real deal. Nevertheless, I added it to that corner of the collection called 'I should have returned this, but I feel a need to keep it'.