Fun Riddles

Question: I can be sun,
I can be sand,
and I can be bird.

What am i?

Question: A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be?

Question: What has a foot but no leg?

Question: A person was born in 1940. Today is his 18th birthday.

How is that possible?

Question: There are 3 switches downstairs, each corresponding to one of the light bulbs upstairs. How can you figure out which light switch goes to which light bulb by only making 1 trip upstairs?