Train Builder is an online HTML5 game presented by yiv.com, it's playable in browsers such as safari and chrome. You can play the game on smartphone and tablet (iPhone, iPad, Samsung, Android devices and Windows Phone). Train Builder is a puzzle math brain game. Do you dream of driving or building a train? Now will help you realize your dreams today! You can build your own train. However, you need to find the right carriage and connect the train by doing these math problems! Come on, brainstorm 92.45% of 98 players like the mobile game.