Stack and Make New Words. Players stack and make new words by changing the beginning or end! Chunk Stacker is a challenging and stimulating word-building game that develops reading and spelling skills. It encourages strategic and lateral thinking as players compete to fill their trays with words made from frequently used onsets and rimes. Includes a 48-page dictionary for word look-up and definition, word trays and 80 onsets and rimes tiles. The rules are simple, but involve plenty of higher-order thinking. Players select from face-down tiles and try to make words on their stackers, making and breaking as necessary. When a player turns over a tile that can't be used, the turn ends. The player with the most tiles on their shortest stack wins. Strategy counts!