Using these balloons is super easy. You can fill them with air using a balloon pump, with water for a fun water balloon fight, or with helium to make them float. When filling with helium, you might want to use a helium tank available at party stores. For air, a simple hand - held balloon pump will do the job. Before the event, check all the balloons for any leaks. Keep in mind that these balloons pose a choking hazard to children under 8, so always keep uninflated balloons out of their reach and have an adult around when children are playing with them. After the party, deflate the balloons carefully and store them in a cool, dry place for future use. If any balloon breaks, throw it away right away to avoid any risks.