Quoting Lizplustwo:" DD likes when we do the bicycle with her...that always get a smile "
Quoting TheDude:" Everyone always gives me hell when I say this but our LO smiled the day she was born. Doctors saw it ... [snip!] ... and we have photos. Gas, reflex, whatever - it was a smile. As far as smiling socially, that came sometime around 4 - 5 weeks."