This game is a collection of 20 colorful, odd-shaped wooden blocks, plus a bookmark-sized cardboard base. Players take turns choosing a block, and then try to place it on the current tower of blocks. Only the first block placed may touch the base, and no other block can touch the table or the base. You can only use one hand to place a block. The first time a player causes the pile to tumble he is a SQUARE. The second time he is a CHARACTER. The third time he is a BLOCKHEAD! and is out.