http://www.mahoodsculpture.com/balloon-sculptures-how-to/
How long will my balloon last before it gets deflated?
Tomorrow, these balloon sculptors are coming to my school to sculp balloons for charity and I’m getting one. They’re not filled with helium. These balloons are those long ones and they’re twisted and stuff to form the shape. You know, balloon sculptures. How many days will it last before the air starts to get out? Will it last 3 days?
Thanks very much for you help, it’ll be much appreciated! 
it might very well, don’t play with it, don’t pop it and don’t keep it in a cold room and it has a better chance of survival and for it to keep fresh
I do this for a living some of the balloons animals i make last for a week so i say just be cautious with it and it will last at least 3 days
Balloon Sculpting – Flower