There are many guided tours related to the Sagarda Familia. Some of these tours focus just on the church but there are tours that presents the Sagrada Familia together with other modernista buildings designed by Antoni Gaudí.
There are also different panoramic tours in Barcelona that pass through the Sagrada Familia too. Moreover, the tourist bus of Barcelona and some bicycle tours also cross through the church (for additional information – Attractions and Tours in Barcelona).
Regarding families with kids, there is an easy guided tour for children in the church. It takes 15 minutes and is designed for kids above 12 years old (for additional information – Kids and Families in La Sagrada Familia and Kids and Families in Barcelona).