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The easiest way to create a base for the wishing well is to use an existing, wooden container. A barrel or wooden planter roughly 2–4 feet (0.6 – 1.2 meters) tall will make a small garden ornament, while larger containers can be used to make something closer in size to an actual well. If you do decide to use one of these options, skip ahead to the next section, on attaching a roof. If you'd like to make your own circular well base, use the instructions below. If you prefer a square container, build a planter box, then skip ahead to attaching the roof. If you have access to a table saw, you can make your own wooden ring out of lumber. Here are some guidelines for the raw materials:  Sixteen pieces of 1 x 4 (25 x 100 millimeter) lumber will make a wishing well that looks quite circular, and measures about 2 feet (0.6 meters) across.  Use eight pieces of 2 x 4 (50 x 100 millimeter) instead to save time and money, making an octagonal well. Cut all pieces to the same length, which will be the height of your wishing well. If you want the well to be portable, or usable by children, choose a height of 4 ft (1.2 m) or less. If you plan to build a roof, cut two of the pieces at least 2.5 ft (0.75 m) longer than the others to serve as roof supports. Cut one end of these pieces to a fencepost-like point, using 45º angles. . Bevel each long edge of each piece of lumber, to ensure that they fit together tightly when arranged in a circle. For a sixteen-sided barrel, cut each edge to an 11.25º angle. For an eight-sided barrel, use a 22.5º angle instead. Use a protractor, rafter square, or angle gauge to set the angle of your saw.  For a barrel with n sides, use an angle equal to 360 ÷ (n x 2). See the tips section for an alternate method of finishing you barrel, that does not require beveling. Lay out the lumber flat on the ground, touching each other along the long edges. Push them against a straight edge to make sure the bases line up. If you are using extra-long roof supports, place exactly half of the short pieces in between them, to make sure the roof supports end up opposite each other.  For example, if you are using sixteen pieces, lay out a long roof support, seven short pieces, then a long roof support, then the other seven short pieces. If you are using eight pieces, lay out a long roof support, three short pieces, a long roof support, then the other three short pieces. Once you have beveled the lumber and laid it out, rotate one slat of lumber onto the next, so the angled edges fit perfectly. Repeat until the barrel shape is formed, with the help of an assistant if possible. If you cannot roll the barrel together, use wood glue to fasten each slat to the next in turn. If you would like the barrel to have a bottom, trace out the dimensions of the bottom piece while the barrel is rolled together. Cut out the bottom from a single piece of lumber and wedge it into the barrel, then continue on to the next step.  If you leave your wishing well without a base, you can use it as a decoration around existing features, such as fountain pipes or flower planters. Clamp the barrel together. Whether or not you used glue, clamp the final barrel shape together by tightening two hose clamps around it, one near each end. Use a third clamp near the middle if the barrel seems loose.
Consider using a barrel or box as the base. Gather lumber. Use a table saw to angle the edges of the lumber Lay out the lumber. Roll the lumber into a barrel shape. Add a bottom (optional).