They're young, they're proud, they're cantankerous! They are the mighty X-Babies! Seeking to capitalize on the success of the X-Men broadcasts to his race of couch potatoes, otherdimensional media mogul Mojo gets a new idea that is sure to be a hit: revert the mutant heroes into babies! And if that doesn't work, he'll just create his own X-Babies! Witness the heroic spirit of the powerful X-Babies as they team up with the X-Men and Excalibur to take down Mojo in an effort to create a life all their own! Collecting X-MEN ANNUAL #10 & #12, EXCALIBUR: MOJO MAYHEM and X-MEN (1991) #46-47.
— Description from Comic Vine community (comicvine.gamespot.com).
