I liked the way this project allowed my children to do their own work but create pieces that were unique and presentable. I had envisioned helping them a great deal, but found that the the art mediums at both stages of the project were very forgiving. My six-year-old and four-year-old made their windows almost entirely on their own. I think an older child could include finer detail and could maybe be more creative with the project.
Glass rectangle from a small picture frame
Black fabric puffy paint with a fine tip
Clear liquid glue