A toy building brick system includes a brick which has an outer surface including a plurality of outer walls. A male peg is attached to one of the outer walls. The male peg is configured to engage a female connector and includes a post having a terminal end. The terminal end has an outer peripheral edge. The outer peripheral edge has a notch positioned therein. The notch faces an adjacent edge of the outer wall attached to the male peg to prevent adjacent male pegs of adjacent bricks from abutting in such a manner that the male pegs bias the adjacent bricks apart from each other.