Windows need sun-catchers, especially if the view is, well, urban!
These winter snowflake sun-catchers brighten up our view, which is safety grills and sky scrapers.
Snowflakes are pretty, and they make a great math lesson, too. Kids draw and cut geometrical shapes around the edges.
The prep work is not hard: I fold copy paper in quarters. Then I cut 3 points with variations, like straight, curved, or zigzag. So easy, and so beautiful.