This is a fun family project. Start with some canvas panels and acrylic paints from the craft store. I selected a small variety of colors that looked good together.

(One crutch that I’ve used to feel more confident in this is a paint palette card from the paint store, which has little samples of all their suggested color-matchings. I like the Sherwin-Williams Arts and Crafts Historic Palette in particular. You can look at all their color palettes here.)

Next draw guidelines with a pencil on the canvas. We did an abstract bunch of crossing straight lines.

Use the acrylics to fill in the various areas. We found it easiest to fill in a random selection of areas with one color before moving on to the next color. This helped keep the colors on the paper plates separated. If you’re working with very young children, you might even want to let the first color dry before moving on to the next. On the other hand, mixing may be the look you’re going for!

Finally, when the colorful paint dried, I went over the guidelines with black acrylic to make it look more like a stained-glass pattern. I also painted the edges of the canvas black, to help hide the staples and give it a more finished look.

You could also just use a Sharpie marker to make the guidelines and not worry so much about filling everything in...