Yesterday I had a student rambling random facts. One is that if you collected all of the iron in a human body, you could make a nail. It’s true! And I happened to have some Raisin Bran handy to prove it.
Just follow the instructions posted here. The instructions call for Total brand cereal and a very strong magnet but I was able to do it with Raisin Bran and a binder clip. It was an interesting activity while my students waited for their eggs to cook. This could be part of a nutrition activity about fortification or minerals.