Decorators may use helium balloons to build balloon sculptures. Typically the round form from the balloon restricts these to uncomplicated arches or walls, but on occasion extra formidable "sculptures" have been tried. Some early balloons have been manufactured from dried animal bladders, like the pig bladder. Some balloons are employed https://ballon-arch42097.bloggactif.com/38079815/the-ultimate-guide-to-ballon-arch