Keep things short. Preschoolers can absorb information fairly easily, but they learn best through short activities and lessons that don't tax their attention spans. Introduce short versions of Bible stories that boil the meaning down to a few simple concepts, and engage in short activities that will help them memorize those concepts. Vary the activities to keep the children from becoming bored or restless. Young children are sensory learners, so they will learn better if you include lessons that engage all five senses.
Show enthusiasm for the Bible. If they see you like to read the stories, the children will soon develop a passion for their favorite Bible stories too. Praise them for wanting to read Bible stories and for understanding the messages. The children will associate reading the Bible with the feeling of praise and excitement and will be inspired to learn more.
Focus on one specific truth when you teach a Bible story. Repeat the message about three times as you are teaching the story to the children. Young children learn through repetition, so this will ensure that the message sinks in even for children who don't remember every aspect of the story.
Don't be afraid to take breaks. Some people get so caught up in teaching the Bible to children that they neglect the very obvious fact that they are teaching children. Children get restless, and if they start to get restless they won't want to learn anything. Take breaks, go outside and play games. Once they expend some of their energy, they will be more likely to want to learn more.