Tri Mags - One Block 48 piecesFun for everyone, our Tri Mags stimulate both imagination and creativity as well as promote basic logical thought. Each Tri Mags cube is made up of 48 large, easy to handle, colorful pyramids. Held together by magnets, they fit together only when the magnets are properly aligned. Not immediately apparent (even to adults) your child will first have to understand how the blocks fit together in order to build with Tri Mags. A design booklet is included