What happens when you combine a mutant terrorist with a toddler? You get Lil’ Magnus. I’m sure they stopped picking on him at daycare once he started whipping Slinkys around.
Ah, the X-Babies. Those little stinkers were dreamed up by Chris Claremont and Art Adams and first appear in the pages of X-Men in 1988 (Uncanny X-Men Annual #12 for the trivia buffs). Though looking at this panel from the issue, they don’t like babies so much as a team of miniature X-Men.