I just bought a scrabble game from the thrift store to make some of those pendants with, I think I paid 79 cents for the game.
So, I would check your local thrift store for the tiles.
I also think that the lettering is a die cut from sizzix or cuttlebug (I believe I have the dies for that font, but they're all packed up right now).
I'm not sure where she got those boxes, but check out these boxes. I think these would be just as cute! SQUARE with HEART TOP Favor Boxes
I hope that helps!