Cut a piece of 1/2-inch plywood 24 inches square as the table top with a circular saw. Cut two pieces of plywood 24 inches long and 4 inches wide as the front and back skirts for the top. Cut two pieces 23 inches long and 4 inches wide as the skirts for each side.
Put wood glue on one edge of the 24-inch long front and back skirts. Position them on the underside of the top and flush with the edges. Use a cordless screw gun and screw tip to drive wood screws through the top and into the skirts. Repeat this to attach the 23-inch long side skirts between the front and back skirts and flush with the edge of the table top.
Turn the tabletop over so the skirts are facing up. Cut four pieces of 2-inch square pine stock as table legs. The legs should be long enough so the tabletop is at a convenient work height. Apply wood glue at the inside corners of the skirts.
Stand a leg in each corner and drive wood screws through the face of the skirts and into the legs. Use two screws at each attachment point for stability. Turn the table upright and allow the glued connections to dry overnight.
Mark the center of the table top. Use a 1-inch diameter hole saw and drill and opening for the sabre saw blade. Turn the table over on a workbench. Position it on the edge of the bench so the hole is not obstructed.
Place the sabre saw on the underside of the top with the blade through the hole. Position the saw so the blade is in a direct line with the square tabletop. Use 1/2-inch screws to attach 1-inch wide metal clips that hold the saw in place. Turn the table over and cut a piece of wood material to test the table. Install additional metal clips if needed.