Abstract: A kit and method for coloring the inside of a ball is disclosed, with the kit comprising at least one inflatable transparent or translucent ball having a valve stem, at least one colorant, and at least one paint injector for injecting at least one colorant into an inflatable ball. The paint injector comprises a hollow barrel, a plunger which fits into the hollow barrel, and at least one hollow needle for injecting said at least one colorant into said ball. The kit may also include a pump for inflating the ball before the colorant, preferably paint, is injected into the ball.