We had an assortment of fabric scraps and templates and let everyone use their creativity and get to work. We even had some buttons to accent. Everyone made one girl and one boy onsie. They turned out very cute. I stitched the edges which ended up being less difficult than I imagined.
Left - For the Boy, Right - For the Girl
Left - The whole gang (minus one). Right - My gift to the girls, I usually do burp cloths with ribbon, but now I might start adding cute shapes to them too.
I have even made a few more for prego sister-in-laws, my BF, and myself. Bet you can't wait to get your packages!
My suggestions if you are going to try this:
1) Use Wonder Under - iron on adhesive with paper backing to trace shapes
2) zig-zag stitch the edges to avoid the fabric fraying
3) wash and dry onsies and fabric beforehand
4) Avoid shapes with narrow sections
5) Use thicker material. Some of the thinner material was harder to stitch close to the edge, especially if it was a narrow section.
Watch a tutorial here from Martha.