Just a lttle something I was thinking of making. Just a little fifth dimensional box that contains all lost things in the universe past, present and future. Should one ever find this box it will seem ordinary (despite beening able to see through it on the sides and bottom) and empty, but put something inside the box (concrete or even abstract) and you will get something of equal value back out, but what that something is may not necessarily be what you want and if you put it back in the box does not mean you will get what you put in back.

So are you a daring gambler? Will you put something into the box?