A few months ago I did a really fun family portrait shoot. We all met up at Katheryn Albertson Park which is a beautiful place for such a taking pictures. It has rich greenery, winding paths and ponds filled with fish and water fowl. It's also a popular place for wedding ceremonies. There are literally hundreds of fun spots to explore. And aside from all the great vistas, the numerous trees also provide the right kind of diffuse lighting for some really great close up shots.
The other challenge is photographing toddlers. In my experience, the best approach is to put them down and just let them do their thing. Trying to get them to pose at best bores them and at worst they get annoyed after a while. However, if you let just them be themselves, then the child is happy and you get some great pictures that help the family remember what they were like at this age.
It's a lot of fun working with the customer to see what kinds of pictures they are looking for and encouraging them to experiment to what surprises may come up. If things go really well, they'll even want a picture with the photographer. :)