Both kids had apparent receptive language understanding by 4-5 months. My son spoke early and often while my daughter started conversing late, at 2 �, when her 6 month old brother started speaking. Although she was quiet, as an only child for her first 2 years with me as her full-time caregiver, she was able to direct us through gestures, eye contact and facial expression. I didn�t keep track of new words. When my son started part-time day care at 14 months, the teachers were astonished by how well spoke and his conversation topics. The director commented that he spoke as well as their most advanced Kers, which was as high as the program went. There was no denying his behavioral differences as compared to age peers when he was a toddler. At the same time, our daughter spoke better, but less, than her age peers so she stayed under the radar more, but her teacher and program director did mention that she was highly mature socially.
They each walked at 9 months and ran by 11 months. We didn�t have stairs when our daughter was a baby, but our son climbed stairs at 11 months.
