Can you use watercolor on a shoebox?

Yes, you can use watercolor on a shoebox, but keep in mind that the cardboard may absorb the paint differently than traditional watercolor paper. To achieve better results, it's advisable to prime the surface with a layer of gesso or acrylic paint to create a smoother base. This will help the watercolors adhere better and maintain their vibrancy. Once dry, you can paint and decorate your shoebox as desired.