Best riddles with simple answers

There’s a key that opens no doors but fills your stomach, what key is it?

What do you call a cat crossed with a fish?

What time of day, when written in a capital letters, is the same forwards, backwards and upside down?

A slender body, a tiny eye, no matter what happens, I never cry. What am I?

Every night I'm told what to do, and each morning I do what i'm told. But I still don't escape your scold.

It's 7:00 am. You are asleep and there is a sudden knock on the door. Behind the door are your parents, who came to have breakfast. In your fridge: bread, pasteurised milk, juice, and a jar of jam. What will you open first?

You measure my life in hours and I serve you by expiring. I'm quick when I'm thin and slow when I'm fat. The wind is my enemy.

Which reindeer loves to go to outer space?

I am pronounced as a one letter alphabet. I am written with three letters. I am complete with just two letters. I am double. I am blue I am black I am brown I am gray I am yellow and I am green. I can read from both ends. I appear the same every way! What am I?

I go in hard. I come out soft. You blow me hard. What am I?