Here's a quick project for any season.
It's a reverse applique process. I like this better than the standard applique process because you don't have to use fusing.
I made a simple monogram for each girl. I found the shirts at Goodwill for a dollar or two. I had the Halloween material in my stash.
The process is simply to print out whatever image you want to applique and cut a square of material to cover the size of your image plus about an inch all around. Then pin the material to the inside of the shirt and then pin the paper over the top. Zig zag stitch directly on the paper. Carefully remove the paper by gently ripping it from your seams. It's a delicate process because you don't want to rip your seams. Flip the shirt right side out and clip very carefully along the seam on the inside of the applique. I use very small embroidery scissors for this. Make sure your seams are all in tact. The last step is to flip the shirt back to the inside and trim up any excess fabric so it's not so bulky.
I'll make sure to have a step by step tutorial the next time. This was the first time I tried this and I know I'll be doing it again!