Short simple riddles

I live in lakes and rivers. I eat fish and birds. I have four legs and a long tail. I have lots of pretty teeth. I am a...

Wash it and it isn't clean. Don't wash it and then it's clean. What I Am?

Where do bedtime books sleep?

How far can you run into the woods?

I taste sweet and juicy. I smell fruity. I feel rough and wet. I look like a bumpy ball. What am I?

When does Halloween come before Valentine's day?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I eat insects. I live in the pond. I hop. I am green. What am I?

When you don't have me, you want me, but when you do have me, you want to give me away. What am I?

If you see a bird sitting on a twig, how could you get the twig without disturbing the bird?