Show, don't tell. Above all, have patience. First, do the puzzle yourself, talking to the child about the various things in it. Let the child mix it up when you are done - they enjoy that more than solving the puzzle at first. Second, guide them patiently about turning all the jumbled pieces face-up. They may not understand corners and edges, which is perfectly okay. The process will become clearer in their minds as they start connecting parts of the puzzle before making the whole, like a Ship of Theseus [not quite, but I just love philosophical thought experiments (and the Sohum Shah debut movie - https://youtube.com/shorts/_pOzVWTQ4FQ | https://www.youtube.com/watch?v=JPAq0oxYyhY )]. Thirdly, celebrate their small wins so that they are encouraged to build better. Show them the puzzle picture constantly [I stuck it on the inside of the lid of the puzzle box]. It will help them get the full picture [see the pun?]. Fourthly and finally, be prepared for the kid getting bored - DO ...