I really like this project because it does not require any special talent to achieve it, and yet the result is very "professional".
You will need a large glass frame or an old window, white glue pot, black acrylic paint, acrylic paint of several colors, a brush and drawings.
Add enough paint in a pot of white glue to dye the glue in dark black and mix well with a stick.
Glue drawings with dark contours under the glass by positioning them where you want them.
Apply the black glue all over the dark contours you see through the glass. Let it dry.
With a paintbrush and acrylic paint of several colors, paint the inside contours.
In a few hours, you will have created a super decoration!
Another possibility: make a stained glass version by drawing lines and shapes, and painting the entire window of another frame!
Children can also do their own version with their favorite drawings!