Wish Bottle -- this is pretty and "inspiring". What if next birthday, a petition paper were placed inside a pretty corked bottle, decorated and prepared with a few drops of appropriate oils and herbs, etc. Then when making a wish, and blowing out the candles some of the lingering smoke could captured and corked into the bottle. It could be kept until the wish either comes true or shifts into a different wish. This same concept could work anytime, not just a birthday.