This app boggles and expands the mind

Bookworm is an intelligently accessible word game for the iPhone that will expand your vocabulary as you pass the time. Part Scrabble, part Tetris, with a dose of the New York Times’ Sunday Crossword, Bookworm will test your vocabulary as you accumulate points by tapping and dragging your way across a large board of letters. Different modes reward you for speed and spelling out the longest word.