I loved this activity when I did it in my Arctic unit in December and I loved it even more today! We did a Map Talk Nat Geo style. I printed out the Map from their Map Maker Kits. As they colored and labeled, I described the continents, the oceans, and the garbage patches.
They learned a LOT about the world’s oceans, saw how ugly the garbage patches make them, and they got lots of geography input! Give it a try! Even if you aren’t doing the whole plastic ocean unit, this little freebie is a great way to bring in something cross curricular.