Here's another simple sticker to make, button stickers. And the best part is they only take about 20 seconds to make, try to beat that! Simple directions below.
Using double stick foam tape, peel off one end of the tape. Add a little glue to it (I like to use E6000 glue). Place it to the back of the button. Let Dry. Done. You'll notice I also applied this technique to some lace flower trim. Experiment and try other items like, googly eyes, little toys, checker pieces, etc.
To package for a gift, use old button cards and place your stickers on them. If you don't have access to any of these vintage cards, you might be interested in these vintage trim tags from doe-c-doe. Enjoy.