Simple buoyancy laboratory. I set out to create activities which use items around the house, both to save on cost, and to make it easier to access the topics from home. This uses soda bottles and plastic straws and some other easily found items to create a fun learning experience. Students are also not going to be overwhelmed by math in this one...though if a teacher wishes it can be added. It includes a "for the teacher" section for those who would like a little heads up on what to look for.