Speak as the kite. A good answer has three parts — a promise, a warning, and something the kite would want the child to notice.
Sample answer: “Hold my line tightly and do not be afraid — I have carried the wind on my back all my life, and today I shall carry you. Sit very still, because I am only paper and sticks, and one sudden movement could tear my wings. Now look right down: that little green square is your park, that grey thread is your road, and those tiny coloured boxes are the rooftops of your town. Remember what it looks like from here, and remember that you are not big and the world is not small — it is only that we are very high. When the wind grows tired I shall bring you down gently, and you can tell everybody what you saw.”
Why this works: it stays in character (the kite speaks of its paper wings and of the wind), it uses details from the poem (“look right down”, “the rooftops of town”), and it ends with a thought, not just a description.