Trains.io 3D is a slithering train game in a 3d world. Become the grand training game by eating others and growing longer. Collect screws and toolbox to grow faster. Good Luck! Train.io, 3D train game, grow train, train game, 3D games, kids games, boys games, fun games, HTML5 games, online games, 3D game, train eating, collection, screws, toolbox, adventure, boy, kids