With the free Formulator Tarsia software from Hermitech Laboratory, (you can download the software and see more information by following the link) it is possible to create

puzzles of various types. These work well with students of any age.

Craig Barton has a section of his website devoted to Tarsia – note all the ideas here for using Tarsia in the classroom and TES Resources host an extensive collection of Tarsia Puzzles.