I'm a first time mommy and I had a few questions. My first question is for the past week or so when I put my baby on her tummy for "tummy time" on the floor she will put her arms like she is doing a push up and then roll over on her back. She's done this every time she's on her tummy. She's only a month old! Is this count as "rolling over"? I thought this happened around 3-4 months? Also, my baby doesn't smile very much and she hasn't laughed yet. I read that by now she should be doing this already, so is there something wrong? For other moms, how long did it take your baby(ies) to smile, laugh, and roll over?