Paint Blocks use a gridded pattern as a color map. Each square on the chart tells you which color to paint in that space.
Acrylic craft paint is the easiest starting point because it is affordable, widely available, dries relatively quickly, and layers well. Small flat brushes give you better control along square edges than large round brushes.
Helpful supplies include acrylic paint, small flat brushes, the included printable transfer templates, graphite transfer paper, a pencil, ruler, painter's tape, a water cup, paper towels, and a clear sealer. Painter's tape is optional, but it can help protect long straight borders when your surface allows it.
The cleanest Paint Blocks projects come from thin coats, patient drying time, and organizing your colors before you start.