Challenge your mind with Brain Blocks! Each set comes with eight blocks composed of a unique number of cubes topped with bumps and divots. Some blocks interlock, some don’t. Whether you are transforming a wall into a chair or skyscraper, Brain Blocks are sure to provide hours of mind-teasing fun. How many new shapes can you create? This item is suggested for ages 8 and up. It is designed for one person to use at a time.