Best easy riddles for kids with simple answers

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

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?

Someone said you sounded like an owl.

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?

I'm tall when I'm young, I'm short when I'm old, and every Halloween I stand up inside Jack O Lanterns. 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?

Slayer of regrets, old and new, sought by many, found by few. What am I?