Simple riddles

You can hold it without seeing or touching it! What is that?

It can fill a room without occupying space. What is that?

When I look at her, she smiles at me. When I wink at her, she winks at me. When I kiss her, she kisses me back. When I say I love you, she says it back. 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?

There was a railroad crossing without any cars and trucks! Can you spell that without using any "R"?

You are on your way to visit your Grandma, who lives at the end of the valley. It's her anniversary, and you want to give her the cakes you've made. Between your house and her house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake. How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. 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?

What needs an answer but doesn’t ask a question?