STEM Wheels Team Speed Stacking Toy, Red N/A Imported Magnetic engineering - This playset contains 144 Yellow magnetic rods and 104 non-magnetic steel balls that let you connect and build awesome creations You want. Make an architecturally sound bridge! Educational and stimulating - Goma's award winning line of products help children of all ages develop Imagination and curiosity through the Science of magnetic construction. STEM learning product Assuring safe play - manufactures to the most rigorous safety standards. At our facility in Switzerland production is monitored through each phase to adhere to the highest safety standards Specifications - Recommended for children ages 3 and up. Warning: contains strong magnets. Keep away from sensitive devices such as credit cards, computers, and medical devices like pacemakers