VEVOR Magnetic Blocks, 150 PCS Dark Castle Set, Magnetic Building Cubes for Kids, STEM Montessori Sensory Toys for Christmas Birthday Gift, Construction Stacking Toy for 3+ Years Old Boys & GirlsProduct Features Freeform Building & Dual sided Themes With 150 magnetic blocks and dual sided themes, your child can create flat designs, 3D structures, and even iconic recreations! Mix and match with other magnet blocks sets to build new stories Stable Construction Thanks to neodymium magnets and ultrasonic welding, these magnetic blocks stay securely in place, even during multi layered builds. Ideal for hours of play without falling apart Secure