I used this puzzle piece black-line to do a project on pass-times with my students. They wrote what their favourite thing to do was in a full sentence and then drew it. I told them they had to colour every inch of their puzzle piece.
The end result looked something like this:
But it looked better once the rest of the students finished. Unfortunately I didn't take a picture of the final product for some reason, probably because it was the end of the year. Anyway, you could use the pieces for just about anything. They could be used for a great first of the year art piece where they draw about themselves and then show how they all fit together to make up their class.
It's been a great week! Thanks for all the ideas.