The sail boats turned out really cute. They floated, they were bright, and while I still wished the bases were a bit more opaque, I thought they’d do quite nicely in the wave bottle.
Unfortunately, water sealed they wouldn’t stay upright. I tried a variety of things to keep them balanced, weighting the bottoms with pins and beads, cutting down the sails, but eventually I had to just give up on the sail boats. Shame. I think they’d still be a fun (and easy) craft to do with kids though, as long as you didn’t mind them not lasting.
When the boats were in play, I’d planned to fill the whole bottle with water and oil, so it would look as much like ocean and sky as possible. Once I gave up on the boats I realized there was no reason not to leave a top layer of air, allowing another section of floats.
I have no idea why the sequins didn’t sink to the bottom of the water layer. Not a one. In the glitter bottle, they fell down along with the glitter, but having a layer of oil on top seemed to make everything sit a bit lighter in the water (the balls floated significantly higher). I have no idea why this is. I assume there is some physics-y explanation, but maybe it’s just a fluke.
The bottle didn’t turn out at all like I’d envisioned it, but I’m still pretty happy with the final product. Whenever I (or Matt) get around to sealing it, I’ll be sure to post photos of Ender so you can see what he thinks.