I would definitely try the Activity Set on Weather. Animals in the Cold, What clothes to wear?, Hot and Cold. I visited Lapland last December so I would use some of the photos I took.
We would use lots of teacher lead discussion using pictures and books as stimulus. I would share the facts about polar bears and penguins and discuss their colours and why they are these colours.
We would discuss how these animals stay warm and how we as humans keep warm. We would give the little experiment using Vaseline a go and deduce what we learned.
We could discuss what clothes to wear to keep hot and integrate this with Gaeilge.
We could also integrate with Geography and learn a bit mote about North and South Poles.
I would conclude the them of work by doing an English First Steps Writing Report on the Polar Bear or Penguin.