Welcome! At that age, my DC attended a few hours of pre-K a week for socialization, and we read many, many books at home. We also explored topics that were of particular interest to them, visiting various museums, planetariums, and zoos. We also spent a great deal of time at the library. When we could find them, we signed up for "special interest classes," although these can be challenging to find at that age.
Does you son have special interests or talents that you could start/build on - chess, art, etc.? Is he interested in learning to read or is he already reading (I wouldn't push it if he's not interested, but if he is, it is a GREAT way to start to explore various topics)?
