This is a project we do at the end of the year. The students have a list of tasks to review what they have learned. The grade is simply for writing the tasks out – some students just draw charts and fill in all of the information. However, there is an incentive to be the most creative. I have given gift cards and other prizes for the most creative from each class. In fact, there are many businesses who will donate your prizes if you ask nicely. One year, i was able to give movie passes for the local cinema!
Here is the list of tasks for Spanish II: MAPA 2
Here is the last of tasks for my Spanish IV: MAPA 4
On this blog, you can see the winners from previous years. Some wrote the tasks on items or as part of the overall image, others use the task responses as the lines for the drawing. 
Adventurous Educators 
Wow, this is a very cool idea. No pressure for a good grade other than completion, but an element of competition.