Baby! By fingerzilla1 Mar 10, 2010 Baby's Born Period: Mar 10, 2010 to Mar 10, 2012 Sensorimeter May 10, 2010 Baby raises head May 31, 2010 Baby rolls over Jul 10, 2010 Sits with support Aug 25, 2010 Sits without support Oct 25, 2010 Pull self to standing position Dec 20, 2010 Walk holding on to furniture Jan 10, 2011 Creep Mar 16, 2011 Walks Period: Mar 10, 2012 to Mar 10, 2016 Preoperational Period: Mar 10, 2016 to Mar 24, 2022 Concrete Mar 10, 2022 Formal Stage continues for entire life.