Brain Flakes brand discs from VIAHART are a new construction toy which teaches both boys and girls spatial thinking and lets their imaginations run wild! 16 wheels and 8 axles, 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! They click together and apart easily for all ages and levels of motor skills. They come in a great reusable plastic jar (PET). The pieces themselves are made from safe and tested polyethylene (PE). The cap of the jar is made from polypropylene (PP). Our discs are a revolutionary addition to the world of childrens and adults construction toys. Get a Brain Flakes set today! - Includes 16 wheels and 8 axles which connect with Brain Flakes interconnecting discs and a durable plastic tube for easy storage ; No instruction booklet is included but instructions are available online for free ; Wheels, axles, and discs easily click together for ages 5+ with some children as young as 3 having no problems - Child safe ; BPA, lead, heavy metal, and phthalate free ; Compliant with ASTM US CPSIA safety regulations - Develops spatial intelligence and thinking ; A great solo or collaborative group activity for school classrooms, makerspaces, montessori, daycares, libraries, or home ; Countless design possibilities and hours of skill building play ; Engineers Start Here - Size and weight ; Product measures 2.75 x 2.75 x 8 in inches ; 7 x 7 x 20.3 in centimeters ; Product weighs approximately 0.34 pounds or 0.15 kilograms ; Wheels measure 1.55 inches or 3.94 cm across and are 0.5 inches or 1.27 cm wide ; Axles are 3.78 inches or 9.6 cm long and 0.58 inches or 14.75 cm wide - Manufacturer warranty ; 90 day manufacturer warranty for all manufacturers defects