Photo Calendars

http://www.visual-idioms.com/

Your students can make their own photo calendars. They can make calendars for each other,  for friends/ family, or to decorate the classroom. They choose 12 idioms or proverbs  as mottos (one for each month). They should have positive connotations (Everything's coming up roses, Every cloud has a silver lining, You are my ray of sunshine, I'm on cloud nine, etc.). This is the most important part of the process: students have to go through all the idioms they know and mentally sort them out to find those that they need.
This is a site where your students can create free photo calendars http://www.calendarlabs.com/photo-calendar.php.and and print them out.

Another great tool is Pho.to which offers a number of online services for photo editing, photo fun and sharing.