These look beautiful spread out under our Christmas tree every year.
These blocks were fun to make. I made a few sets of them one year for me and the ladies I visit taught. These are spray-painted wood blocks (scrap wood) and hand-painted letters. Then I sprayed antique spray all over for a vintage finishing touch.
If you don't want to hand-paint your letters print out letter from the computer and use them as templates. Or you could use vinyl for a little bit more money.