I have always loved kites. As young lad I used to build my own and fly then as high as the string would let me. I have been thinking about building a box kite as a winter project., as that is one of the only kites I have never flown.
Below is a photo of me flying my kite @ 2500m on the French/Spanish border in the Pyrenees. It is around the size of a A4 and only takes off in strong winds, but still well fun to fly.