Children's imagination

When I was a little girl, I thought the world ended somewhere and I could travel to the border and fly in the space [like diving from the edge of it... awesome!]. Adults told me that's impossible, but I didn't believe them. I planned to take some bagages and [some] food with me. 'Course [-> of course], my trip was postponed until I would grow bigger. My brother did not know about my plan, because he was too young for this magnificent project. I've grown up, and my trip has always been postponed. And now I wonder: where are my wonderful wings?

Very nice! :)

Children' s imagination (or: The imagination of childhood)

When I was a little girl, I thought the world will end somewhere and I could travel until the border and fly out into the space. Adults told me that it's impossible, but I didn' t believe them. I planned to take some baggages and some food with me. Off course, my trip has been postponed until I grow bigger. My brother does not know my plan, because he was too small for this magnificent project (at that time). I've grown up, and my tripp has always been postponed. And now I wonder; who are my wonderful wings?

Because I am not native too, so I corrected where I could notice. 

The essay is just beautiful.  And thank you for your correction!

Children' s imagination

Wen I was a little girl, I thought the world ends somewere and I could travel until the border and fly in the space. Adults told me that' s impossible, but I don' t believe them. I planned to take with me some bagages and some food. Course, my trip was postponed until I grow bigger. My brodher dose not know my plan, because he was too small for this magnificent project. I grow up, and my tripp was every time postponed. And now I wonder; where are my wonderful wings?