We are studying Penguins this week. After learning about the North/South Pole climates, Antarctica and it's location and attributes we decided to make a little model. It didn't work out as I envisioned, but it was fun.
First we froze 3 baggies of water to make icebergs. Once frozen we placed them in the Arctic Ocean (with added food coloring for a nice touch). We noticed how much of the iceberg was underwater compared to how much floated above it. The icebergs didn't show up very well though. (Next time we will have to make the icebergs a white color.... will have to think about how to do that!)