I hate it when people make riddles that have hundreds of possible Antwort but only one answer is correct. It's like asking for the factors of 32, but saying only 4 and 8 are correct. Time, hot air baloons, helecopters, a light object in the wind, a kite, an earlier Weltraum craft (Before the shuttle era.), a hypothetical antigravity device, the big blue note. Weiter time, be a bit Mehr specific why don't you?
@Dr I would have to agree with Heitsi I mean my answer was correct as well. Yet the answer was pretty simple. Besides it would help ya know. Du can't get too upset oder bothered at people who guessed possible answers.