Tummy time

Someone asked me the other day how Lucy does on her tummy. I laughed and said, well I don't really know how she does on her tummy because I think we have put her on her tummy...ummm.....once. She lies on her tummy on my chest or on Mike's chest but she hasn't really experienced true "tummy time". She actually stayed this way for close to 15 mins. without complaining. She was just talking to herself and fairly content. Until she wasn't and then, wow, she was mad.