Happy-Happy-Happy!

Anna does this thing where she sways her head from side to side while saying "happy, happy, happy." She only does it when she's having a lot of fun and when she's just, well, happy! The last two times she's gone to bed, yesterday's nap and last night, she has just played in her bed for at least an hour before going to sleep. And both times we could hear her saying "happy, happy, happy." We wondered if it was her just saying that she was happy to be in bed or that she would be happy if we would get her out.