Each TRI MAGS cube is made up of 24 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 to build with TRI MAGS. 30 challenges are included with suggested designs to get you started but the real fun begins when you start creating your own! For ages 8 and up. Includes:48 Total Tri Mags Pieces