Thanks. I know how to solve them but am not good or fast at it. I cannot believe some of the world's speed records. I do not buy them anymore. Sort of an investment for the future and/or a conversation piece for visitors. My favorite is probably the calendar cube. A desk item. You have to twist it each morning to show the current date. Duh. It might take me all day to accomplish that. Next are the blank cubes. Cubes that have all the same tiles on all sides. One is called the Boring Cube. The Stupid Cube. Then the advertising cubes. Often given out as door prizes at conventions. I have Coke, Pepsi, Texaco, Budapest Airport, Google, Avon, Manchester United, Snickers, Groton's fish, McDonalds, Xbox, Cadburys, Samsung, GE, eBay, the modern Museum of Art, the NY subway system, Snickers, Dairy Queen., and something like 200 others. I have 5 cubes that were only ever for sale in Estonia. ETC.