Each of these 24 numbered boxes contains 42 unique puzzle pieces that, when put together, form a picturesque scene of a national park. 24 Days of National Parks Adventure - Turn the holiday countdown into a relaxing journey across America's great outdoors with this advent calendar 2026. Open one box each day, enjoy a new challenge, and watch your collection grow into one impressive national park puzzle 1008 Pieces Puzzle Experiences - Inside are 42 puzzles of each day that combine to create a total of 1008 pieces jigsaw puzzles.