KTuberling is a free and open source simple constructor game for Linux and Android. It comes with 10 playgrounds with different game themes. These are Potato guy, Potato guy 2, Ancient Egypt, Butterflies, christmas, Pizzeria, Robin tux, Robot workshop, moon and Train valley. All game are more suitable for kids. The idea of the game is based around a once popular doll making concept. It is released under GNU General Public License v2.0 or later.