A beautifully made piece of micro magic. Four blocks are clearly shown all around. Two red (hearts and diamonds) and two black (spades and clubs). The heart and diamond blocks are covered with one tube, the spades and clubs with the other. When uncovered, there is now one red and one black suit block under each cover! This is repeated, and when uncovered the blocks have completely transposed. The blocks are ingeniously designed. The changes are made silently with no noise at all ... no shells or magnetic overlays are used.