This is a great 2 part Mini-Lab that uses everyday materials to reinforce the concept of density. It is an editable Word Document so you can edit it to fit your personal classroom needs.
It includes student directions for both parts of the activity as well as follow up questions and observational drawings for students to create.
The lab requires these basic household products:
Raw Egg (could also hard boil)
I love using this with my middle school kids. It i simple to do but really helps reinforce the concept of density. It also leads to some great classroom discussions.