Most foil balloons that can be filled with helium can also be filled with air but of course wont float To fill a balloon with air insert a straw into the valve and blow into it.
What happens if you fill a helium balloon with air?
One is that atmospheric pressure is dramatically reduced at high altitudes, so a helium balloon expands as it rises and eventually explodes. If you inflate a balloon beyond its limits at room temperature, it will break into small pieces up to about ten centimetres long.
Can you fill helium balloons with just air?
Most balloons can be filled with helium or air, simply check the instructions provided or on the product page for details. Some balloons can only be filled with air due to their size (like mini latex and foil balloons), and some balloons are not designed for helium (like balloon garlands).
How can I get balloons to float without helium?
Because Helium gas is lighter than air, but it is not the only gas we can fill the balloon, we may use hydrogen gas as well. The density of hydrogen gas is 1/2th of the mass of helium gas so we can consider it to make a floating balloon. Air can also be used to fill the balloon.