Children 3 years old and up are expected to attend Sunday School when Sunday School is in session.  When Sunday School is released for the day, children up to age 8 or in 3rd grade are welcome in the nursery until service is over as long as the child is registered for the nursery.  Children are also welcome in service.  During the summer, when Sunday School is not in session, children up to age 8 or entering 3rd grade are welcome in the nursery as long as they are registered.  Registration form can be found here.