Brain Flakes 500 Piece Interlocking Plastic Disc Set Brain Flakes brand discs from VIAHART are a new construction toy that teaches children spatial thinking and lets imaginations run wild! Every jar contains over 500 discs, which means hours of endless fun and engineering education. In addition to brain building, Brain Flakes discs improve the coordination and dexterity of young children, keeping both their minds and bodies active! The discs measure 1.3 inches across and are 1/10th inch thick. They click together and apart easily for all ages and levels of motor skills. They come in a great reusable plastic jar (PET).