Inhalation of helium can be harmful. Never breathe in helium.
Balloon Safety & Care: (1) The average vehicle holds about 24 inflated balloons and they're best stored in the back seat. (2) Balloons look their best at room temperature – keep them warm on cool days and cool on warm days. (3) Inhalation of helium can be harmful. Never breathe in helium. (4) Uninflated or broken balloons can create a choking hazard. Keep an eye on your little ones. (5) After your party properly dispose of uninflated balloons. (6) Do not release balloons into the air. Help keep balloons out of our waterways and powerlines.