First "laughs" I've actually caught

So baby girl will laugh, but not a whole lot, she mostly just giggles, and I can't really figure out what exactly makes her laugh. But a few days ago I was able to capture a few giggles on video. 

She was seriously laughing like crazy before I got my phone, but at least continued to giggle while I recorded it. She initially was just laughing while I changed her diaper. I think she might be ticklish...