DS had a huge vocabulary of single words (probably a couple hundred by 24 months) but just couldn't put them together. Or he could, but not very often. He would also drop a lot of endings off words. Now I know this was probably because of an "output" issue or motor planning.
He did babble as an infant but didn't do the mamamama babababa type babbling until 9-10 months old whereas DD was 5-6 months old. despite the fact that he is now diagnosed with developmental coordination disorder, he crawled by 8 months and was walking well by the time of his first birthday. Then his gross motor development kind of stopped.
He had a lot of ear infections, colds, and fluid in his ears and ear tubes were placed at 30 months. At that point, he started talking in phrases. I'm not sure if that was a coincidence or not, but I often wonder how much role the ear problems played in his development.
