In our small community, for instance, our library offers a Story Hour three times a week that the kids really love. A number of books are read to the kids, a craft is taught, and a fun physical activity is presented in each session. Check out your library to see what it offers in the way of children's education. Your church could probably use a lending hand with special events, paperwork, poster-making, or retreats. Offer your services and see how quickly your offer is accepted.
Kids love the physical activity they can get through tumbling and gymnastics.
Even newborn babies can participate. Gymboree offers musical activities, games that focus on motor skill development, pre-gymnastics, relay games, and activities that concentrate on social skills, such as taking turns. These programs are typically well-supervised and taught by well informed instructors. You can also meet other mothers through this regular interaction. We have all heard that exposing our children to Mozart can enhance their mathematical development.