To start using this jigsaw puzzle, first, empty the pieces onto a clean, flat surface. Sort the pieces by their edges and look for distinctive parts of the Stranger Things characters. Work on building the edges first, then gradually fill in the middle. When handling the pieces, be gentle to avoid bending or breaking them. After you've completed the puzzle, you can use puzzle glue to preserve it or carefully disassemble it and store the pieces in the box. Keep the box in a dry, cool place to prevent the pieces from getting damaged over time.