Safety Warnings:[IMAGE]CHOKING HAZARD - Small parts. Not for children under 3 yrs. The Sea of Marmara is situated in and around Istanbul and connects the Black Sea and the Aegean Sea. The name Marmara derives from the island Marmara which is rich in sources of marble. The Marmara Sea was the subject of ancient Greek mythology as well as modern folk songs. Educa puzzles are made using "green and blue board", a thick high-quality paperboard that ensures a perfect fit between puzzle pieces and creates virtually no puzzle dust. For ages 12 and up. Contents include: 1500 puzzle pieces. The assembly size is "85x60".