Putting together a puzzle can be a fun way to pass time. Once the puzzle is completed, you might want to save it so that you can display it. Keep the pieces together with homemade puzzle glue.
Bring the water to a boil in a small, heavy-bottomed sauce pan.
Remove the pan from the heat and add both packets of gelatin.
Stir the gelatin and water mixture until the gelatin is dissolved.
Add the vinegar and the glycerin.
Stir the mixture until it thickens.
Pour the mixture into the glass jar.
Tighten the lid and allow the mixture to cool.
Use the glue within three to five days for best results. Heat the glue by placing the jar in a pan of hot water until the glue is warm, but not hot, and easy to spread. Apply to puzzle with a brush. Allow the puzzle to set for a few days until the glue has gelled.