Cut out the pieces and distribute to the students in groups or individually. They must then put the figures together. I have received feedback that many students have liked these, and some have also asked to take them home, so that their younger siblings can try them.
Feel free to print on thick paper and put them in a bag/envelope, so that the puzzles can be reused.
NOTE: I know people are anxious to download files from an unknown site. If that is a problem for you, you can copy the pictures and paste into a document.