When you put all the pieces together, you will see and feel the beat of the city that never sleeps Improved memory, better problem-solving skills, higher IQ, improved mood and lower stress levels are just a handful of benefits attributed to regular jigsaw puzzle solving activity Castorland Puzzles are produced due to the conformity with European Standard - EN-71. All raw materials – cardboard, paper, inks, etc. are made in Europe and delivered by the best European suppliers Sharpen your creative thinking and problem-solving skills! Castorland (Poland) jigsaw puzzles are products of famous Polish polygraphic company Castor Printing and Publishing House established in 1989