Decorators may well use helium balloons to develop balloon sculptures. Commonly the round form with the balloon restricts these to very simple arches or walls, but every now and then much more formidable "sculptures" have been tried. Some early balloons were manufactured from dried animal bladders, like the pig bladder. https://balloonarchframe87532.wikiusnews.com/1680319/how_balloon_arch_frame_can_save_you_time_stress_and_money