I have been making these ecosystems in a box for a while ( shout to Alan Parkinson for the idea many years ago) , with a focus on rainforests. This year, I extended it to rainforests, Antarctica and for those who were researching around the subject, they could choose whichever ecosystem they wanted. This little differentiation really worked as those with interests in other areas really came to the fore. We had deserts, savannah, hedgerows, coral reef and a freshwater river with actual river water!
We then used the little peer assessment tags I found on twitter a month back, unfortunately, I cannot rememebr whose idea they were and rather than post it notes falling off all the time, the boxes have wicked little tags which do not ruin the aesthetic!
Well worth your room being covered in boxes for a little while and fantastic for open evenings and the like!