I started taking my DS to a playgroup when he was about 11 months old as I felt he needed to have interaction with other children as he doesn't go to day care. He now goes to 2 different playgroups on a Tuesday and Wednesday and he just loves it and I enjoy spending chatting time with the other Mums too. I'd definitely recommend a playgroup, he'll love it and you'll get to meet some new friends. We are in South East Melbourne, not sure where you are but you should be able to find one nearby quite easily.