Why is this the answer?

The answer is kite because this wonderful riddle describes exactly how a kite moves and looks when you are flying it on a breezy day. Let's look closely at the riddle's clever clues one by one. The first clue says, "I love to dance and twist and prance." When you are outside flying a kite, you know that the kite does not stay still at all. The wind is invisible, but it pushes and carries the kite, making it bob and weave and zip across the sky. The movement is so fast and happy, it looks exactly like the kite is doing a happy, wild dance high above the ground. The kite seems to be having a wonderful time moving freely in the strong currents of air. Next, the riddle says, "I shake my tail, as away I sail." Many of the most exciting kites have a long, flowing, colorful tail attached to the bottom. This tail is important because it helps keep the kite balanced so it does not flip or spin out of control. As the kite flies through the air, that tail swings back and forth and wags behind it. It really looks like it is shaking its tail as it 'sails' through the air. Sailing is a perfect word for how a kite glides smoothly and quickly on the currents of the wind, even though it is not a boat moving in the water. The last line is the key clue: "Wingless I fly into the sky." A bird flies with wings, and a fancy airplane has big wings, but a kite does not have any wings at all. Instead, it uses the power of the wind and the special shape of its paper or cloth surface to catch the air. This special design lifts the kite way up high off the ground. It is amazing how such a simple object can fly so high without any wings! A kite is also special because it is always attached to a long piece of string. You hold the end of that string, and you are the one who controls the kite and helps it dance and sail and prance. You can pull the string to make it go higher or loosen it to let it dip. The riddle is solved by thinking about this fun, high-flying toy that only appears on a windy afternoon.