Stimulate your child's developing mind and channel their creativity with the Geomag. Your little engineer will have the tools to build architecturally sound structures. With a little imagination, they can create fantastical and abstract designs! This STEM.org-certified toy is designed to help children develop hand-eye coordination, motor skills, problem-solving abilities, and visualization through the science of magnetic construction. It is allowing for larger and more complex creations. The Geomag MASTERBOX PRO-L helps kids understand magnetism and magnetic polarities while gaining knowledge of engineering concepts through trial and error. It promotes hands-on learning and encourages creativity by enabling the construction of 2D shapes, 3D shapes, and advanced structures. This set offers a creative approach to problem-solving, stimulating imaginative play and curiosity through magnetic science.Details:Silver/Light bluePackage measures 12.2" x 10.04" x 4.33"Set include 388 pieces30% stronger than our classic lineCertified by STEM.orgNon-toxic materialsAges 3 and upContents:Magnetic rodsNon-magnetic steel spheresPanels