making one is so simple, and while a sewing machine makes them faster, it is not necessary to use one. in fact, it was so easy that i didn't even take any pictures during the process.
here's how you do it:
1. cut two of the same shape out felt (two hearts, two stars. etc.). make sure they are the same size.
2. sew the pieces together leaving about half-an-inch open.
3. using a funnel, fill the shape with rice through the unsewn opening.
4. hand-stitch the opening closed.
viola! done! so easy and so sweet, right?
i found that about 25 seconds in the microwave is perfect, but you might want to try out a few different cooking times, depending on the size of your warmer. (make sure no metal accidentally gets shoved in the warmer, you don't want any explosions in the microwave!)
i made a cute little tag to add to mine, turning it into the perfect little gift or party favor.
do you want some, too? download your own here.