We just got this for our 2 month old girl and she loves it already.  The first time we put her on it, she wasn't in a good mood...but she stayed lying there perfectly content for over a half hour!  She even did some tummy time, which she normally hates....since she was right in front of the mirror she started making happy noises and did a few happy minutes on her belly.  Then we turned her back over and she stayed there for a while longer.  The lights and music kept her happy and she kept turning her head from side to side looking at everything that was hanging from the toy bars.  It was...