Everyone knows that children are like little sponges.
Wet sponges attract water more quickly than dry ones because water molecules are drawn to each other.
What does this have to do with teaching a Bible class? New knowledge and experiences will be absorbed more quickly when it relates to what the children already know.
Children crawl before they walk and walk before they run. They must add before they multiply and multiply before they divide. If we want children to learn and retain what is taught, we must make sure that what we teach relates to their previous experience and knowledge.
I present these application ideas right before the Bible lesson is presented, but they can be used afterwards. Doing them BEFORE the Bible lesson is taught allows the child to "experience" a concept prior to the lesson presentation. The lesson may have a greater impact that way.
This concept is presented more fully at http://comefillyourcup.com/2019/01/30/perk-up-kids-bible-class-with-an-egg-separator/