Recycled CDs Form Colorful Floating Waterlilies by Bruce Munro. Again, i love re-purposed art; art made of trash. This was quite interesting and i think would look good as an instillation in some city.
Mother's day window - lovely idea - simple to implement and gives a personal feel. Run a competition for your customers to feature photos of their Mothers. my lovely Auntie Janet lives on Waiheke Island too : )