A fun 365 brain challenge with an illusion a day desk block to keep you engaged at your desk or work space. Exercise your mind and more with this paper puzzle desk block that is presented in a box to keep the contents in place. This product is not dated so can be given as a gift all year round. Wake up your brain and focus, one illusion at a time. - 365 brain bending illusions on a paper block - Presented in a box - Product not dated so can be given as a gift all year round - Inspired by Professor Rubik, and his Cube