What's old is new again.Here's another ticker for folks looking for something a little out of the ordinary. The Singing Machine Company (SMDM), as karaoke is making a comeback, but not necessarily for the reasons you might expect. Google's (GOOG), (GOOGL) Youtube video services are attracting a lot of new talent as children who want to run their own videoblogs. It's currently the only widespread social network that doesn't have any age limits, and many adults who grew up around Youtube are now old enough to have kids that know how to get online and use the service. The growth of individual bloggers, and not just kids, has fueled demand for microphones, and it's a very easy thing to pair Youtube and karaoke with them as well.A penny stock with sound valuations?Now, here's the thing. SMDM is a penny stock, but in a rare change of pace, actually has pretty solid fundamentals, and a trailing P/E of just 10 as I'm checking today. The stock has momentum, too, having risen more than 50% from just one month ago after recovering from what had been a nearly 10 year low.I think I'm going to need to give this one a buy rating.