I was teaching my third graders about buoyancy and had them test out several objects (the objects listed on this observation page) to see if they float or sink. I also taught them about predictions and had them fill this column in before handing out the materials for the experiment. Overall the kids absolutely loved this lesson! We went through the results once the classroom was cleaned of all water and objects and discussed the results.
I have also included an adapted version for students who have a bit more difficulty writing. If students have dyslexia, I would print the adapted sheet on coloured paper!
Hope this helps!