Performer shows 5 plastic (Acrylic) Domino like Blocks with different colored spots on them and an opaque black bag. A spectator is given the 5 blocks and the bag. He is asked to place any of the blocks in the bag, close the bag and hand it to the performer behind his back. The performer can immediately reveal the color of the block in the bag behind his back. We supply you the five special blocks and the bag. The effect can be repeated as often as you like.