Scrabble Boosters (Scrabblers) are unique lasercut bigram and trigram tiles that form words. Play various new word games or enhance any Scrabble™ game. These double and triple letter tiles give you extra points for extra fun! There are currently at least six ways to use Scrabblers tiles: Gridlock mode Flip mode Stackers mode Solitaire mode Boardless Crossword mode Scrabble addon expansion —description from the publisher