Our preschool class at Calvary Church is available during the entire Sunday service each week for children ages 3-4. Children are welcomed with toys and activities designed to make them feel comfortable and loved and to build relationships with their friends and teachers. 
After some time for play, they watch a short video every week, then participate in a teacher-led lesson and an activity to apply the message.
We use The Gospel Project curriculum to teach preschoolers that the Bible is true, that God loves them, and that they are an important part of our church family.