*** Inside the Tube-Go? Set: 16 wheels and 8 axles | Single color - Black | Compatible with all Brain Flakes? brand discs | Building instructions are available online here

*** Ages: 5+ (under adults¡¯ supervision, some children as young as 3 have no problem!)

*** Brain Flakes? Wheels and Axles Size: Wheels measure 1.55 inches (3.94 cm) across and are 0.5 inches (1.27 cm) wide | Axles are 3.78 inches (9.6 cm) long and are 0.58 inches (14.75 cm) wide

*** Material: Brain Flakes? wheels and axles are made from durable and safe polyethylene (PE) | The clear reusable tube is made from PET with our signature yellow cap made from polypropylene (PP)

*** Safety: Child safe | BPA, lead, heavy metal, and phthalate free! | Compliant with ASTM US CPSIA safety regulations

*** Education and Learning Approved: Great off-screen time activity! | A great solo or collaborative group activity for school classrooms, Makerspaces, Montessori, STEM education, daycares, libraries, or home! | Check out our digital building instructions and task cards here 

*** Product Package Size: 2.75 x 2.75 x 8 inches | 7 x 7 x 20.3 centimeters

*** Product Package Weight: Approximately 0.34 lbs | 0.15 kgs