A cleverly cunning cubical conundrum. Individual cubes attached by twisting, turning joints. Flexible tetris-shapes are satisfying to flip and spin. Attempt to recreate the cubical configurations of emerald, ivory & black shown in the Tridio Puzzle Book. Scan the two-dimensional designs pictured, and set kids' minds & hands in motion. Modify the three tetris-shapes. Consider the color placement. Stack the Tetris pieces. Bring images to life in three-dimensional structures. 48 visual challenge puzzles.