I use the online puzzle generator, it is important to get the cuts all going across first, then all the cuts going up and down next. Done like that, the pieces don’t tend to fall out randomly and get marred by another cut going over them again. I print inkjet on regular paper, spray adhesive or use wood glue to paste the image on a piece of mount board, then do the cutting. If you use wood glue, best to weight it down and leave it overnight to dry. Lots of fun for kids, might be a good thing for your children’s teachers to have custom puzzles made.! The link to the puzzle generator; you can save the page and use it as an application on your hard drive- don’t need to be connected to the web to use it!