I wanted to make a homemade valentine for my daughter, so I made a simple little bag, with a felt heart and filled with a few sweets.
I just used a scrap piece of fabric like 6x3 or so and pressed it with an iron, almost in half, but left one half a little longer so that I could have a flap.
Then prior to sewing up the sides I cut a heart shape out of felt and sewed around the edges, then added a little love note.
Next I sewed, I used a serger, but could just as easily been done on a regular sewing machine, around the edges, leaving the flap open. Sewed on some velcro, and filled with a few sweets.
Lucy was so cute, she said "Mom I love you, because you made me a valentine."