All necessary precautions have been taken to ensure our products are manufactured under hygienic conditions. This set of 4 jigsaw puzzles is based on animals that can survive in the extreme cold or polar regions - Polar Bear Penguin Walrus and Arctic Fox. The puzzles having dimensions 17.5 x 17.5 cm are suitable for children of 4 years of age and above. The child has to fix the puzzle pieces together in the correct manner to form the complete picture. Starting from 12 pieces and going up to 24 pieces the child can begin with the easier puzzle before attempting the more difficult ones. Made in India