Yes...this technique is really simple! It reminds me of bathroom tiles! Or, maybe even kitchen backsplash type tiles! The raised part of the lines is on the back of your cardstock so the squares are raised like tiles with the "lines" being the grout! The only tools you need are either a Scor-It or your paper trimmer with a scoring blade! Other than that all you need is your cardstock, some ink and your stamps! Can't get much easier than that! According to the tutorial you can make your "tiles" 1 inch, 3/4 inch or 1/2 inch. You decide how big you want your tiles to be! Just line up your cardstock and start making your score lines at the intervals you decide to use. I used 1 inch. Then, turn your cardstock to make your score lines along the other side. Then, with your raised lines from scoring on the back side of your paper use a stamp pad to apply ink directly to your cardstock. Don't press down too hard. That's what will make your "grout lines" stand out more. Then, start stamping. Again though, don't press down too hard so that your stamped image doesn't show on your "grout lines". Then, it's just a matter of finishing your card or project! Here are the items I used to make my card.
Stamp sets: Priceless, Oval All
Cardstock: Whisper White, Daffodil Delight, Old Olive
Ink: Daffodil Delight, Old Olive, Night of Navy
Other: Scor-Pal (or other scoring tool), Night of Navy 1/4" Grosgrain ribbon, Scallop Oval punch, Wide Oval punch, Stampin' Dimensionals
All products made by/sold by Stampin' Up! (except Scor-Pal)