Stimulate developing minds and channel their creativity with Geomag PRO-L Magnetic Construction Set. Your little engineer-in-the-making can build architecturally sound structures like a bridge using panels, magnetic rods, and non-magnetic steel balls. This STEM toy is designed to help children of all ages develop hand/eye coordination, motor skills, problem solving, and visualization through the science of magnetic construction. The set includes 36 silver magnetic rods with polarity indicator, 20 non-magnetic steel spheres, 14 triangle panels, 12 square panels, 3 pentagon panels. GeoMags comply with the most rigorous European and international safety standards. Suitable for ages 8 and up. Not for children under 3 yrs.