Innovative, engaging, and educative are some forte of the Guidecraft Classroom unit blocks. These European quality unit blocks are made to inculcate analytical skills in kids. These finely sanded rubber wood building blocks are smooth and splinter free. Your kids would love playing with the smooth round edged pieces. Easy to assemble and detach, they offer a challenging and fun filled experience. This particular set has 86 pieces with a lifelong warranty. These magnetic and colorful building blocks are greatly resistant to dents and dings. Definitely a cost effective purchase, they have been scientifically proven to enhance sensory actions of the tiny tots.