Sight Words Sentence Builder, a childrens learning game, has just gone Free. The app was just updated today to work on the Amazon Fire TV. To celebrate the occasion, the publisher is giving the app away for free for the first time ever. The app teaches young children the 220 most common words in the english language by having the child arrange the words into common phrases. The app has a 4.4 star rating with 66 reviews and works with either the voice remote or game controller.