3rd & 4th Grade Elementary School Pythagoras Pythagoras block set that promotes visual thinking. - Target age: 6 years old and up - Set contents: Pythagoras blocks, instruction manual - How to play: Assemble three-dimensional shapes, with explanations - Product number: PGS-111 - Features: Educational toy that promotes visual thinking The outer box shows signs of use. Please check the photos. This educational toy was my child's favorite from a young age. Whether it helped with their education is unknown.