I filled the bottle about 2/3 full with water, and here are the objects that we put into the bottle. I also had a rubberband, but O insisted that it belonged on the doorknob, not in the bottle. Before she put each object in the bottle, we predicted whether the object would sink or float.
After we put all of the objects in the bottle, we talked about which objects surprised us :) We were surprised by the beads since 1 of them sank, 2 floated, and 1 sank and then rose back to the surface to float. I was also surprised that the bear floated. She loves to roll the bottle across the floor and watch the objects sink or float to the surface.
O went a little overboard with the glitter, and she was excited to use her vacuum to clean up!