Interesting...Looks like you need to buy the "Serial Translator" for an additional 13 bucks..Not a big deal, but the only concern I have about it is the ability to sync sound with it. You'll need that for talking skulls. Maybe in addition to a cowlacious you could use it PC free for two skulls. Yea, for around 130 bucks (cost plus 2 cowlacious boards)looks like a pretty good solution for 2 talking 3 axis skulls free from being tethered to a PC. I may look into it. Thanks!