The river Thames is the longest river in England and flows right through central London. Gaze upon this impressive waterway and feel the wind of the bright red trolleys rolling past as you piece together this 1000 piece puzzle! 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: 1000 puzzle pieces. The assembly size is 68" x 48".