Here are my developments of the designs. 

A few sketches of the flower broom

Then I made a model to show the concept; using foam for the flowers

I developed the balloon concept so it would be like the balloons are floating away with the coats

Then I made a rough model to show the shape of the balloon

I like the shape but I think it may be very heavy, so it could be made so the balloons are actually vinyl stickers perhaps

I have also been thinking about the blind concept so made a very rough model of how I think it could work

There could be a landscape silhouette stamped out repeatedly with different colours for the different seasons each one creating a different mood within the space.