Yard Wand
From UO Excelsior Wiki - Ultima Online Free Shard
The Yard Wand can be purchased from the Token Vendor Stone at Trinsic Bank.
File:YardWandOptions.jpg
You can add things in and outside of your house ranging from Water to Lava to Swamp to Plants. Some items, such as floor tiles, have several different types; once you place a floor tile you can double click it and it will change to the next style. To remove items and have your money refunded to your bank just double click the item. If double clicking the item changes it rather than removes it, then just click on it once and select Sell to get rid of it and have your money refunded.