Butterfly foil shaped balloon the butterfly balloon has a self sealing valve. They can be filled with air so they can be fixed to the wall or they can be filled with helium so that they float. The balloon will come flat and not inflated with either air or helium, you must inflate this balloon yourself. One of these brilliant balloons are an ideal gift to any young child, guaranteed to put a smile on their face! it could also be used as a fantastic decoration at your childs birthday party!