A three dimensional stand alone pop up assembly and method for making the same, the assembly comprising outer structural wall panels connected with an internal support structure having a spreader, center support element and base components. The touch system includes a generally planar acoustic-sensing assembly that includes the thin glass sheet. Hollow portions are provided in a formation region of the light-shielding layers, each hollow portion being shaped so that a cross-sectional area obtained by cutting along a plane parallel to the one surface of the base material is large on the light-shielding layer side and is gradually decreased as being away from the light-shielding layer.