I bought a plain onesie and spiffed it up with felt for a gift for my friend Charity's baby boy:
First, I tried to use a stencil on the felt, but the stencil ended up being too small and hard to cut. I was trying to make a frog-the toes killed me. Make sure you have GOOD scissors because felt is not the easiest to cut. I used kitchen shears.
After the stencil fail, and because I can't draw very well, I decided to make an EASY pattern of my own, so a sailboat seemed to fit the bill. I drew the bottom and top on a piece of paper, cut it out and pinned it to the felt and cut the felt.
I then sewed the boat on with embroidery floss, using all six strands and exposing the stiches. I also sewed in the sail "pole" (not sure what it's actually called) and added a cute little button for the top.
It was really simple, but I am so excited by how cute it turned out!
Total Cost of this project: about $5.