If your careful you can remove the color swatch from the white card and then "Mod Podge"(available at Wal-mart and craft stores) them onto the suface of your choice. I always thought it would be cute to put them on dresser drawers behind the knobs, as a border above the back splash in your bathroom, all around the border of a tabletop ( you might want to follow-up the Mod Podge with a couple coats of varathane) the possibilites are endless!
Put two back to back together and laminate (sheets available where ever scrapbboking supplies are sold) punch a hole in the top then attach them with a string to your luggage and easily identify it.
You can also use them for Christmas tags on gifts, on favor bags as tags, as seating cards for your next big dinner or party.
You could take two of them back to back and place a small pic of your child in the middle on the front of side(great project for the kids) and squeeze a line of glitter glue around the picture border then cover the front and back with Mod Podge. Punch a hole in the top add a nice ribbon and have the kids give them to their grandparents for tree ornaments.
I hope this gets you started with ideas!