This was such a fun technique to play with! Use coffee filters, baby wipes, and ink pads to make a quick and easy tie dye background! See the tutorial here on Splitcoaststampers. I used Smoky Slate, Dapper Denim, and Lemon-Lime Twist so the cards would work for anyone.
The background is applied to a layer of white cardstock with a glue stick! Kids would have a ball giving this a try!