The background of this frame can be easily obtained: It is taken from a  catalog of fabrics, which has the various colors of a fabric range. Thus each painting has a background of diiffrent color.

Each drawing is made  on foil for embossing, then the Children paint it (fine brushes are requested) with paint for stained glass. Some Children chose to paint all the surface to make a painted background, whereas others color only the drawing. Frames exposed as examples were made as gifts for Mother's Day, which explains why they show so many hearts, but you can easily apply the  process to other topics.