The first tricky step was getting a tracing of Zach's hand without him suspecting or knowing too much. I then traced the hand outline onto some freezer paper and ironed it shiny-side down onto a new, plain blue T-shirt. This gave me the pattern for a reverse applique design.
I had an old, paint-splotched green T-shirt that I cut up and pinned to the inside of the blue shirt, behind the hand pattern. This way, I was able to sew directly along the hand pattern through both layers of T-shirt material.
After doing a simple machine straight-stitch, I carefully peeled away the freezer paper. Then came the tricky part!
I had to carefully trim the blue T-shirt away from the design to reveal the green T-shirt material underneath. This had to be done without accidentally snipping the green material!
The end result turned out well, though. I really like how the reverse applique gave me a casual, textured edge around the design.
Last but not least, I added Mordecai's handprint to the center of the hand cutout. Have you ever tried to get a handprint from a two month old? It's not easy! I waited until he was asleep so that he wouldn't wiggle as much... but the paint still got everywhere! In the end I had to paint in his handprint a little since the true handprint was too light... and Mordecai had blue fingers for a week!
The end result: priceless!