Pieces then go together. Each piece ranged from about 1/8 of an inch to several inches long, building larger sub-structure pieces. 1/3 of an ounce added from thick CA and some thin CA, and 1/4 ounce of foam safe CA. Average speed of re-assembly was 6 pieces per hour. I was never good a jigsaw puzzles. Average of one hour per evening. 3 weekends.