Tangram Wall

This is the first summer that I have not taught summer school, taken college classes, or worked a second job and I am starting to find out that I have too much spare time.  While my girlfriend is at work and the hot Arizona sun prevents me from leaving my apartment, I spend my days getting caught up on the first 4.5 seasons of Breaking Bad and working on school stuff for the upcoming year. I am at the point where I am creating things that I think are cool, but not really sure how I am going to incorporate into a high school math class.    Recently, I thought it would be cool to create a Tangram wall (Again, I don’t know what I am going to have my students do with it, but I think it will be cool). I have an extra whiteboard in my room that is magnetic.  I bought some colorful magnet sheets (I used two 8.5×11 sheets per Tangram).  Then cut out two different Tangrams sets using an Exacto knife (part of the fun was figuring out how to make the Tangram correctly on two separate sheets of magnets).





Now I just need to figure out how to incorporate these into my class.  One thought is to print out a bunch (like 100s) of puzzles.  Then put them on the wall by the whiteboard with the Tangrams.   Then, as students complete the different puzzles, they can write their name next to the puzzle they completed.   My only problem with this is, when are students going to have time to be messing around with Tangrams? After school?  Before school? At the end of class?  Any ideas would be greatly appreciated.