How to Make Celtic Stone Birdbaths

Cut open two 55-gallon trash bags by cutting down both sides and leaving the bottom intact. Open up the two bags and cover the work surface with them. Overlap the edges of the bags 1 inch and use duct tape to secure them together. Alternately, use a large tarp if you have one.

Pour a bag of playground sound on the trash bag-covered work surface. Use your hands to mound up the sand. Make the mound 2 to 3 inches tall at the top, tapering down to 1/2-inch at the edges. If the sand is too dry to stay mounded, add 1-2 cups of water and mix it with your hands. Then mound the sand.

Cover the sand with plastic wrap. Place a round Celtic stone on the top center of the mound with the design up. Press it down into the sand and plastic wrap until it is level with the surface.

Apply a concrete release agent to the top of the Celtic stone according to package directions. Directions may vary, but in general, use a paintbrush to apply it.

Mix 2 bags of concrete with water in a large bucket. Add a small amount of water at a time, stirring between water additions until the consistency is moist and pliable, similar to a thick pudding.

Apply the concrete to the sand mound using your hands. Press it against the Celtic stone. At the peak of the mound, make the concrete 2 inches thick, tapering down to 1/4-inch-thick edges.

Cover the concrete mound with a second set of trash bags, cut and taped as in Step 1, or use a plastic tarp. Leave the structure to dry for a week.

Remove the trash bag cover and carefully turn the hardened concrete structure over. Peel away the plastic wrap and remove the Celtic stone from the impression. Leave it to sit for another two to three days to finish setting.

Place the completed birdbath on the ground or on a store-bought birdbath stand.