Coffee Cup Cake Book Money Bank Star Die(small)
Star
It's roughly a box, but it becomes a tiny space inside.
More than just a box,
it's assembled wood,
but perhaps it's more suitable to call it
"wooden cubic puzzle".
5 parts come apart
but they're all exactly the same shape.
Consequently you might think,
"where does it come apart from?"
"where is....?".
But don't think that way,
because the whole thing shifts at the same time.
A large number of various angles exist.
So it's important
that many high quality patterns are manufactured.
And then the precision is also demanded.