Measure the available space in your sculpting area with a measuring tape to determine the dimensions of the sculpting table. The table should be at least 40 inches high so you can sit on a chair or stool while you sculpt.
Measure two sections of 2-by-6-inch lumber to the width of the table, and two sections to the depth. Cut these sections to length with a circular saw, and miter the ends of each section at 45-degree angles with a miter saw. Arrange the sections into a rectangle to form the top of the table frame.
Drive 4-inch wood screws through the frame top at each corner with a drill outfitted with a screwdriver bit. Measure the interior depth of the top frame, and cut one 2-by-6-inch lumber section to this measurement for each 16 inches of table length to form the interior supports. Place the support sections inside the top frame at 16-inch intervals and drive 4-inch wood screws through the outside of the frame into the ends of the supports.
Cut four sections of 4-by-4-inch lumber to the height of the table to form the legs. Stand one section inside each corner of the table top frame. Drill a 5/16-inch-diameter hole through the top frame into the legs at each corner. Insert and tighten a 3/8-inch-diameter 4-inch lag bolt through each hole with a ratchet.
Cut two sections of 1/2-inch-thick plywood to the dimensions of the table top frame with a table saw. Turn the table right-side-up and place one of the plywood sections on top of the frame. Align the edges of the plywood sheet with the frame and secure it to the frame with 4-inch wood screws at 4-inch intervals along the perimeter.
Cover the plywood with wood glue, using a 4-inch paint roller. Place the second plywood section on top and align the edges. Tighten C-clamps along the perimeter and allow the glue to dry for 48 hours.
Sand the surfaces and edges of the table with a palm sander. Paint or stain the table as desired.