S.M.
If you go to a store like Michael's craft store you can get stencils for just about anything. The stencils are thin and plastic and you hold them up to the wall or tape them while you are painting. They make stencil paint and brushes that will be with the stencils. Stencil paint is really thick and you tap it on with a stencil brush that is either a sponge or a flat top brush. It is really easy if you get the right tools. Spray paint is super messy and wont work well with stencils because it will run down between the plastic and wall.