I did this with my students today. I saved up a bunch of water bottles and the students watched as I put it together. All you do is add some water, oil and food coloring. I put a little super glue on the lids so my behavior babies wouldn't have the chance to make a mess.
I teach kindergarten, so I used the younger version of the papers I created. I first let them explore with the bottles, tilt them, move them, give them a little shake. Then I had them get our their science journals. We added t