There's a lots of ways to say what you want, but how about doing it in a totally unexpected and funny way? There is anything funnier in this world than balloons and what about balloons that cause a big confetti explosion? Yes, totally it's super fun to watch, but (I don't going to lie to you) it hurts a little, so here I'm to do it for you! With a happy sincere smile and alot of bravery I will blow a balloon for you until your message looks really big and make a cool explosion with confetti, all of this only for 5$.
Don't doubt on make any question you have, I'm wide open to your ideas and thoughts!
Thank you very much! See you soon :)