Patent ID: 8187050

Claim:
A building element for a set of toy building elements that are capable of being interconnected in a releasable engagement, comprising: a top, a bottom and sidewalls; wherein at least one of the sidewalls includes at least one pair of ridges forming a groove therebetween with an entry opening of a predominant minimum width; wherein said at least one of the sidewalls also includes at least one tongue having a distal portion of a predominant maximum width that is greater than the predominant minimum width of the groove entry opening for interconnecting in a releasable restraining engagement with a said groove in a said at least one sidewall of another said building element, in which the disposition of the at least one tongue and the at least one groove is the same as in said at least one sidewall of the building element such that when said building elements are interconnected said at least one tongue of the building element is interconnected with said at least one groove in said at least one sidewall of the other building element and said at least one tongue of the other building element is interconnected with said groove in said at least one side wall of the building element; and wherein the at least one tongue does not extend outward beyond a virtual plane of the sidewall that includes the at least one tongue, with said virtual plane being defined as a plane that passes through a midpoint of a line that connects a central point on an outer surface of the sidewall that includes the at least one tongue to a central point on an outer surface of the sidewall of the other building element that includes the at least one pair of ridges and is perpendicular to a line that passes through the central points of said interconnected building elements when said building elements are interconnected in a centered configuration.