The organisation is promoting walking to school as beneficial to children's bone development.
It plans to reward children who walk to school during the week with pieces of wooden jigsaw, which they can use to construct the skeletons.
The charity is inviting the press to take photos of the skeletons in an effort to win coverage of the campaign, and is targeting teachers with lesson plans based on the theme of bone development. It will also publish statistics on the levels of obesity among children and the falling number of five to ten-year-olds who walk to school.
The organisation wants to highlight that achieving as high a skeletal mass as possible during growth reduces the likelihood of developing osteoporosis later in life.