Short easy logic riddles for kids

You can see me in water, but I never get wet. What am I?

What always comes into a house through the keyhole?

What happens when you throw a blue rock into the yellow sea?

I eat other animals. I have a big mouth. I am green. I live in the water. Who am I?

When you have me, you feel like sharing me. But, if you do share me, you don't have me. What am i?

Beth's mother has three daughters. One is called Lara, the other one is Sara. What is the name of the third daughter?