Below is a link to a short video (that you can download) that Fox News Channel ran about James McCartney (Paul's only son) stating that some of the Beatles' sons have considered starting a band! The video mentions though that Ringo Starr's son isn't completely sold on the idea. I'll assume they are talking about Zak Starkey, but Ringo actually has two sons (Jason and Zak) and both are drummers. The band would only need one of them to agree to join :)
The video is about 32 seconds long and is in .AVI format. You can download it by right-clicking this link and choosing "Save Link As" (or whatever your browser may call it). Or, you can click on the link above and you might have the choice to open it in your media player, or save it to your computer (it depends on your browser).
It's funny because just two days ago - on April Fool's Day - I posted a tweet claiming four of the Beatles' sons were recording a song for charity. So far my tweet has 133 retweets, and most of those came AFTER I mentioned it was only an April Fools joke! Maybe someday it will be true. Who knows... My tweet is embedded below...
AFD reports that Sean Lennon, James McCartney, Dhani Harrison & Zak Starkey recording song for charity! Band named SOBs (Sons of Beatles)!— BeatlesLane .com (@BeatlesLane) April 1, 2012