These were made with Scrabble tiles and magnetic tape. The adhesive on the tape wasn�t amazing so next time I�d add a drop of hot glue or crafty epoxy to it as well to keep it on just in case.
Naturally, you could do this for any saying you or the person you�re making it for loves. Or you can just do up a bunch of random letters to make a set, I did a little research and it seems that this is the most popular combo.
8 x A D I N O R S T
4 x B F G H K L M P Q U V W X Y Z
12 x E
6 x C
2 x J