It's the 3-D word game that helps you build new words by stacking letters on top of those already on the board! The three-dimensional crossword game takes word play to new heights, literally! Create new words by building on tiles already on the board. How many different words can you get out of one Upwords is the 3-dimensional word game that's stacks of fun. Build words across and down crossword style on the 10 x 10 grid. Or stack letters on top of tiles already on the board. The challenge is to make new words each time. With 100 tiles, you can stack lots of letters to score high! So rack 'em up, then stack 'em up to experience 3-D word play at its very best. Includes grids and numbers for 140 Sodoku puzzles! For 2 to 4 players. Ages 8 and up.