MODULAR TOY SYSTEM WITH ARC TOY BUILDING ELEMENT

原文（中文）

A modular toy system comprising toy building elements including an arc toy building element. The arc toy building element has at least one knob receiving opening formed in a bottom surface or at least one knob formed in a top surface configured for coupling to complimentary coupling elements of another toy building element in a first direction. The arc toy building element also has an arc surface formed as a convex surface on the arc toy building element and extending over a length in a direction parallel to the top surface or to the bottom surface of the arc toy building element, the length is an integer multiple of a modular distance defining the spacing of a regular two-dimensional pattern for the toy building elements.