This is a fast - paced library challenge that is played between two teams. There does not have to be an equal number in each team, but they should be relatively close in size. The students will collect library materials, earn pieces to a puzzle, and complete the puzzle as quickly as possible. I use 25-30 pc puzzles for this activity. I purchased the “floor puzzles” so that the pieces are really big. It is best to use the same puzzle for each of the teams to keep the game fair.