These are the building blocks with imbedded magnetics that enable gravity defying structures. Each hardwood block has a magnet safely hidden inside (some oriented with the north pole facing out and some with south), allowing blocks to be stacked horizontally as well as vertically. The magnets enable children to build cantilevered structures, attach pieces to the face of a building-block edifice, or hang blocks from each other to defy the laws of gravity. Made from Honduran huesito, a durable, fine-grained tropical hardwood, the handcrafted 44-piece set includes different sized columns, planks, trapezoids, and four wheels that give structures mobility, ensuring building possibilities are only limited by the user's imagination. Blocks are colored with 100% non-toxic, water-based dyes. Ages 3 and up. (3 1/2 lbs.)