Answer:
What occurs once in a minute, twice in a moment and never in one thousand years?
There are 7 birds in a tree. A hunter shoots one bird down. How many birds are left in the tree?
Who has married hundreds but always been single?
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
What starts with the letter T, is filled with T and ends in T?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?