You can always look for an accommodating home daycare with an academics minded "staff". My daughter has been learning to read Chinese (her Mom is Taiwanese) since she was a little over a year, and she started learning to write numbers when she was about 27 months at daycare. Like Montessori, most home daycares have children of different ages together, which is probably good for the younger gifted children.
We're looking to move her out soon because we want her doing more group activities, which she is very shy about, but it's been a good fit for her younger years.