I had a lot of help (at least that's what they call shredding polystyrene onto the floor) from 3 of mine. Boys no3 and 4 got in the way, and boy no.1 made the penguins. Afterwards they all played icebergs for a very long time - my floor covered in tiny balls is testament to that!
It's my first ever video all by myself, so don't be too harsh (my other half hates it, so don't be as harsh as him).
The competition is open until Friday 1st May, so you still have time to enter any project or model or anything else on the theme of recycling, planting trees or helping to save the penguins!
UPDATE - We won! How cool is that?! Another 25 or so years practice, and I'll be giving Nick Park a challenge...maybe....