What goes up but never comes down?

I am big cat with furry mane around my head. My roar can be heard from far away!

I eat insects. I can jump. I am green.

I carry my house on my back .I love to eat vegetables too. What am I?

I am brown outside but green inside. I have many seeds and my skin is rough. What am I ?

I am hot and I live in the sky. I'm bright but at night I disappear. What am I ?

I'm round and I go up and down. You can throw me, and you can catch me. Please be careful with me near the windows. What am I ?

Please be patient with me, I'm new to the world. I cry a lot but I smile if you give me milk. What am I ?

I come in many different colours and I get bigger when I'm full. I will float away if you don't tie me down and make a loud sound if you pop. What am I?

I'm not a friend of paper and don't run while holding me in your hands. What am I?

I come in pair and don't go outside without me. You can tie and untie me. What am I?