This activity would be given to a student to complete when all work is done and they want a fun challenge. i usually consult with one to see if they all want to be a part of the process and offer the student a time frame and bonus grades they can use elsewhere upon completion and presentation. the topics can be altered to best suit the child and the intention of the task is to hit upon all aspects of the brain and what excites the student to gain knowledge. I would use a standard rubric to grade. The feedback has been awesome.