Discerning the Body
As parents teach their children with each administration of the Lord’s Supper, one of the central things they must teach is how to discern the Lord’s body. This does not mean that the children (or anyone else) should try to “see” the Lord’s body up on the table in front of the church. That is not the “body” being referred to. Paul is rebuking the Corinthians for failing to see the body of Christ in one another. This is why he points to the one loaf being a symbol of the congregation. We have one church, and that’s why we have one loaf.
This means that children should be required to learn how to see the body of Christ in their fellow Christians. A good place to start is with their brothers and sisters. As they repent of a squabble in the car on the way to church, they are discerning the body. As they look up and down their family row and out across the church, they are learning to discern the body. They are in fellowship with these people and must not be upset with any of them. This is something that a small child can understand and do. — Doug Wilson, My Life for Yours, p. 116.