Shuffles rearrange every letter on the board into new random positions. A shuffle can completely change the board and may create several new words—or sometimes no words at all. Use them when you want to shake things up and look for a fresh set of possibilities.
Balloons add vowels to the board, helping create new opportunities to spell words.
When you use a Balloon, vowels are added to each row or column, depending on which direction contains more tiles. The game places the vowels strategically rather than simply choosing random positions.
Stamps add consonants to the board, giving you new opportunities to create words.
Like Balloons, Stamps place letters strategically rather than completely at random.
Blocks completely reset the board with a fresh set of letters.
Of all the items, Blocks have the highest average potential for creating new words, making them especially useful when you need a completely fresh start.