Abstract: A kit for a construction toy includes at least two construction blocks, where each construction block includes at least one hole, the at least one hole includes a ridged outer ring and at least one peg sized to fit within the at least one hole to connect between the at least two construction blocks with a cam-releasable snap-on connection, the at least one peg includes at least 2 partially ridged outer rings to engage with the ridged outer ring of the at least one hole when the at least one peg is inserted into the at least one hole to securely hold the at least two construction blocks at a non-parallel angle.