Iron over 1/4 in on all 4 trim pieces
turn pants right side out and iron.
Unfold casing pieces. pin right sides together and sew on both ends with a 1/4 in seam.
Pin right side of casing to inside (wrong side) of pants. Sew together with a 1/4 in seam.
cut down the middle of both holes using a seam ripper (make sure not to cut the thread)
you can use Fray Check or hold a flame over the threads for a few seconds, for stray threads
Fold the casing over, pin and sew close to the edge.
using the same fabric we used on the pants and a lightweight interfacing cut a circle and the letter of your childs name.
carefully remove the interfacing on the inside of shirt.
And your done!
please let me know if this was helpful! thanks for looking