Just add helium to the balloons and enjoy. Inflate balloons same day of event. Latex balloons have an average indoor float time of 12-24 hours. Foil balloons can last multiple days if filled and stored properly. Balloons used outdoors will have a much less float time due to the elements. Foil balloons require a low pressure regulated foil inflator to inflate them. These regulators have an auto shut off pressure valve and will not over inflate them. Disposable tanks with a latex inflator will Not properly inflate foils. Balloons can be properly filled at your local Michaels. Discard broken balloons immediately. Keep the plastic bag containing these product away from small children. The thin film may cling to nose and mouth and prevent breathing. Dispose of bags immediately once product is removed.Details:Lilo & Stitch birthday themeAvailable in multiple age numbersMetalized polyester filmIncludes 8 balloonsStitch birthday celebrationPerfect for indoor useRequires helium or airContents:1 jumbo Stitch super shape foil balloon (33")3 Stitch round foil balloon (17")2 robins egg star foil balloon (18")1 happy birthday present foil balloon (18") 1 giant blue number foil balloon (34")