16 month old is constantly is lying on the floor, or standing with her head lying on the sofa, or standing with her head on the floor as if she is about to do a roly poly. She always asks for the TV to be put on and if it's on she would probably lie on the sofa and watch it for hours if I let her.
I've seen it with other toddlers but not to this degree. I'd say out of a 20 minute period of time she'll spend at least half of that on the floor.
She also twirls her t-shirt around in her hand a lot, as if she is self-soothing.
All milestones have been reached, she talks and makes eye contact. She's quite easy going and relaxed, personality-wise so I'm not sure if it's just her nature to want to lie down a lot and observe rather than play?