Paint the foam board background black and let it dry fully before adding any elements.
Paint the foam balls as planets, using layered colors to create surface variation, then set aside to dry.
Shape the Sun directly onto the board using spackling paste, spreading it into a semicircle and adding raised texture.
Lightly press and smooth additional paste onto the planets to create cloud bands and surface ridges, allowing partial drying for dimension.
Glue the planets in place above the Sun, spacing them evenly so labels remain readable.
Add handwritten planet names with a paint pen, then touch up colors and textures once everything is fully set.