A link to this Brick and Stone Stencil product page happened to appear in my Pinterest feed. Having never heard of such a thing before I found the idea quite inspiring. The smallest scale available is 1:48 as this is an overlap with the dollhouse scales. I must come up with some project to justify trying it out.
Many years ago, I produced a 1:12 dollhouse for my daughter that included drawing on the bricks with a paint pen. This process looks like much less work although probably not as durable under playroom conditions.