Here are the FAA rules about balloons and kites: http://www.ecfr.gov/cgi-bin/retrieveECFR?gp=&SID=2ede283f148804503362bdc410923e24&r=PART&n=14y2.0.1.3.15#14:2.0

Here are the FAA rules about balloons and kites: http://www.ecfr.gov/cgi-bin/retrieveECFR?gp=&SID=2ede283f148804503362bdc410923e24&r=PART&n=14y2.0.1.3.15#14:2.0.1.3.15.2 http://www.ecfr.gov/cgi-bin/retrieveECFR?gp=&SID=2ede283f148... So if the balloon or kite is a certain size, there are actually lighting and notification requirements.