Most Catholic Churches of the Eastern Rite confirm children at their baptism. A child who is confirmed may not be confirmed a second time. It is also not proper for them to be in the line of peers to request a blessing from the bishop. Only those to be confirmed and their sponsors belong in this line.
Rather, when the peers of the child are being prepared for Confirmation the already confirmed child should be made aware of the fact that because he/she is already confirmed he/she is a full member of the Catholic Church. As such, he/she may be called upon to exercise a liturgical ministry at the celebration of the confirmation of the other peers. The ministry to which the child is called will depend on the gifts he/she possesses.