A barrier employed to keep children and/or pets in or out of certain areas in the house. The barrier includes four panels. Two main panels slide parallel to each other to lengthen or shorten the barrier as a whole. Two side panels stabilize the main panels and extend to the front and rear faces of the main panels to provide a self-supporting in-house barrier. Each of the panels includes a wooden frame. The wood lends less weight, less sharp edges, and more pleasing aesthetics than, for example, a metal gate. Legs are connected to the side panels to further stabilize the side panels and main panels.