We think it's fair to say that Japanese washi tape is the "it girl" of the crafting world right now. While we think it's very pretty, we've been stumped for a really good way to put it to use. Patty, owner of Tinted Mint, suggests decorating inexpensive wood or cardboard letters with these colorful, patterned tapes. Nothing against Mod Podge, but this does look like an easier and less messy way to cover letters especially if you want to get your kids involved. Patty started by painting her letters, but you could leave yours plain if that's the look you're going for. Since washi tape can be easily positioned and repositioned you can play around with different color and pattern combinations and tape direction until you're satisfied. When you're ready just simply trim the edges with an x-acto knife or sharp blade.
You can see Patty's "how to" page at Tinted Mint where she sells washi tape in individual rolls and in sets.