Pentominoes are geometric shapes formed when five adjoining squares are placed edge to edge. There are 12 different combinations that make a Pentomino. These 12 piece puzzles are perfect for teaching problem solving and patterning activities. Plastic pieces are scored in 1" sections so that visualizing area and perimeter is quick and easy. Set comes in 6 different colors, red, yellow, blue, green, orange and purple. Ages 6-12. Pentominoes, Set of 6 (72 Pieces) packaged in a plastic container.