http://pbskids.org/zoom/activities/sci/flinker.html
This is a fun activity where students try to achieve the same density as water - where their object neither floats or sinks...it flinks!
- It's a great activity to introduce buoyancy - There are different ways to go about this - you can make it a fun single day activity or you can make it into more of a research/scientific experiment project - see the link below:
The important thing for our purpose is that students try to make their object have the same density as water - 1.00 g/cm3 - if it's more dense, it will sink, if it's less dense it will float