A set of 24 word puzzles on task cards! I use these at the beginning of the year as team building activities and at the end of the year as a group activity that keeps their minds working.
I generally give the group that has the most correct responses a prize. (The most recent prize has been a granola bar)
(For the end of the year, this has been a life saver for me with my fifth graders who are done testing and ready for summer!)