Northern Virginia's beloved children's band Rocknoceros: David “Coach Cotton” Cotton, Marc “Boogie Woogie Bennie” Capponi and Patrick “Williebob” Williams. (Rocknoceros)

The Post’s Janice D’Arcy, author of the hot new On Parenting blog who caught up with the three native Northern Virginians, reveals their designs on world domination, and has a sneak preview song from their new album, “Colonel Purple Turtle.” (Sounds like they’re really working the psychedelic angle these days.) The album isn’t coming out nationally until October, but they’ll play it at Jammin Java in Vienna this Saturday, with morning and evening shows. Line up now.

And here’s a video look at Coach Cotton, Williebob and Boogie Woogie Bennie in action: