関連ワード:
do infants only see black and white do babies only see black and white do babies only see black and white when they are born do babies just see black and white can babies only see black and white when first born babies can only see black and white when they are born how long do babies only see black and white how long do newborns only see black and white can babies only see red black and white can newborn babies only see black and white
