Once upon a time, there was a magician named Marty. When Marty died, his magic tricks were sold at a garage sale and that's where you came across this unique item. You don't know if it was supposed to have two tubes or not, but every time you stack the two sets of blocks the same way, cover one of the stacks with the tube, the blocks always match! No matter how you arrange the blocks outside the tube, when you remove the tube covering the other set of blocks, they will perfectly match the blocks on the outside! Maybe Marty the Magician is still with us?