The Geomag pro-L magnetic construction set with 110 pieces offers a challenging building experience for children aged 8 and over. Made in Switzerland, this set combines 36 transparent magnetic rods, 30 metal spheres and 44 blue, transparent panels in various shapes. Thanks to the increased magnetic force, complex and stable structures can be built. The special feature of the pro-L line is the visible polarity on the magnetic rods, which promotes an understanding of the physical laws of magnetism directly while building. This STEM-oriented educational toy playfully supports logical thinking and geometric understanding.