Remember how easy it used to be to believe when you were young? Why not try to let go a little, and trust in what you cannot prove. Make a wish, and believe with all your might it will come true, and just maybe there will be a better chance it will. Positive thinking and optimism can go a long way in life. :)
On a side note, I used to think, (and still sometimes do) that little fairies lived atop the individual dandelion tufts, that float through the air. When you made a wish the fairies could hear it, even if you only said it in your head, and each one of them would try desperately to get to the wish factory. If the wind carried them all the way to the factory, there was no doubt your wish would come true.