Used primarily for Sunday School Bible stories, flannelgraphs combine the 3 S's of children's ministry: Sunday School, Salvation, and softness.
In fact, white Christians were so inspired by the 2 dimensional felt representation of Bible stories that they felt (pun intended) it necessary to move into the next dimension by shaping felt into puppets for puppet ministry (flannelgraph's younger, hipper, nephew).
The flannelgraph truly is a model of flexibility. These terrific teaching tools typically come in four distinct flannel-lined backgrounds:
Aquatic Marine Adventure: For Bible stories like Noah and the ark, Jesus calming the storm, etc.
Khaki Desert Wasteland: The Battle of Jericho, Manna from Heaven... basically the majority of the Old Testament. Characters used in conjuction with this background typically wear a robe, beard, and a colorful head-towel of some kind.
Luscious, Luscious, Sunny Green-Garden: From the garden of Eden to the garden of Gethsemane. This really is your bread and butter, go-to flannelgraph.
Classic 80's Blue: If you didn't recognize any of the three previous options from your Sunday School experience, chances are you grew up before turn of the century and before all of these new-fangled backgrounds were invented. This design has the unique feature of allowing the viewer to imagine the setting as Bible characters hovered in a sea of blue felt.