- Glass Tiles, any home improvement store or website with decorative tile should do fine.
- Magnets, I recommend "super strong" magnets. You can use a roll of magnet tape but be prepared to pick them up off the floor a lot.
- Lettering, use either stickers with a coat of modpodge or my preference, a set of stamps inked with Stayz On Ink.
- Hot glue gun or your favorite super glue.
The tiles come on a convenient grid to hold them in place, I recommend leaving them there until you finish lettering. They pop off easily and keeps everything organized so you don't have to wonder how many v's you used. I went heavy on the vowels with 2-3 of most consonants.
The game I made up for them goes as so, each color has the exact same letters for a word competition. Two players each has their own color, play words off eachother's words turn by turn, until they can play no more. Any leftover letters count against a player, lowest score wins. You can decide how much each letter is worth, or use the Scrabble point system as a basis. I like this game because you can play over the course of days, makes for a good game between busy roommates and something fun to do whilst munching a snack.
I used hot glue to attach my magnets, it's very effective, I've had no separation of tiles from magnets.