Use dynamics: Multipoint works well, add an air field (make sure all is going in the y direction) You should be good to go. Just muddle with the speed, spread, point size etc. make sure you add oppacity to you liking and choose a color.
SimplyMaya specialises in Maya tutorials. We offer over 1,000 individual Maya training videos, ranging from basic Maya tutorials through to intermediate Maya tutorials. Our tutorials are created by instructors with industry experience and are designed to get you up and running in Maya quickly without making it seem like hard work.