My kids really enjoy these puzzles, not to mention, they are great skip count practice. I laminate and cut them out. Then I put magnets on the back (on both ends). Then my students use a cookie sheet for their own work space and work the puzzles. The magnets hold the strips in place; otherwise, they get easily frustrated when the pieces move. I usually try to include several different puzzles in the center because when they finish their puzzle, they usually want to trade and work another one.