Short medium simple riddles for kids

I have a tail. I can fly. I'm covered in colorful feathers. I can whistle and I can talk. I am a...

There are a number of books on a shelf. If one book is the 6th from the left and 4th from the right, how many books are on the shelf?

What goes through a door but never goes in and never comes out?

What kind of cup doesn't hold water?

You always carry me in your hand, always with you, from your birth till your death! I am a fruit. What Am I?

I always come down and never ever go up? Think, think and think! We all just love it.

I know a word which reads the same when written forward, backward or upside down. Do you?