reverse applique dinosaur shirt

I love to do applique.

Not really sure if I do it right.
But I'm no perfectionist so I don't really care.

I also have been wanting to try reverse applique
for a long time and finally got around to it.

Micah had these super cute dinosaur footie pj's
with a broken zipper from MONTHS ago.
Rather than throw them away I figured I could use the material for something else.I found this long sleeve green shirt at W*****t
and figured I could try my hand at reverse applique.

Many months later I finally got around to it.
Here's the basics on how I did it.

I drew a dinosaur pattern on paper that loosely reflected
one of the dinosaurs on the pj's.
I then traced that onto the shirt.
Then pinned the fabric to the inside of the shirt.
Then I just sewed around the line with my machine...And carefully separated the top fabric from the pj fabric
and cut it away with a sharp scissors.

Done and done.I have NO idea how this will hold up in the wash.
But I figured $3 for a CUTE shirt isn't a big deal
so if it falls apart I'll know to sew around the line twice next time.Here's the shirt on the handsome little boy!
Of course since Micah got to pose, Naomi wanted to also!I also made a couple of tie shirts with the pj material!Have you done any reverse applique? any ideas or tips for me?