I have a 15 month old (14 months adjust), and when she's excited, she flaps, and sometimes when she's upset, but mostly when she's excited. She points, says a few words, walks, east well, and sleeps well. She is evaluated by ECI every 3 months, since she was a preemie, and they say she's advanced, but the hand flapping STILL worries me. Soe days she does it much more then others.