I love the fraction idea of using 47/47 meaning 1 whole person. I love the idea of using the area and perimeter to outline their own body image and then for each body part. What a great way to integrate! So many variety of ways to use this. And I also love that students are doing something fun, yet meaningful, without using worksheets.
Here is an Area and Perimeter pack with some fun ideas. More than 6 activities to reinforce area and perimeter measurement.