I don't have much info to give you as my son is only 14 months old but everything he has achieved has been early for his age(crawling 6 mnths,walking 11 months etc). What I was interested in the responses though to your questions was alot of parents were concerned with them sitting down long enough to learn! This helps to answer an earlier question I'd asked in that 'hyperactivity in CAH children-coincidence?' Sorry my son is a salt-waster. I hope this helps at all-it did me!! LIsa D