Answer:
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
A famous home without color and with wings.
Before Mt. Everest was discovered as the highest mountain in the world, which mountain was the highest?
What can you hold in your left hand but can never hold in your right hand?
Small, containing light, You'll need it in the dark, It will provide that spark, and shine into the night. Will light up any pyre, 'Cause it can help make a fire.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.