Have you tried cutwork designs? They are surprisingly easy to do do and give you really nifty results.
This set has 6 butterflies in varying sizes that all fit the 4x4 hoop. These do not need any special tools or needles so any machine that does a 4x4 design can make these.
These designs can be used on garments like the sample sweatshirt jacket we made here. They are also lovely on table linens or curtains.
This set comes with complete instructions with photos to guide you through the steps.
The photos below are samples done on white-on-white fabric and photographed with black fabric behind them so you can clearly see the cutouts.