Marvel's greatest heroes get a pint-sized makeover in this thrilling adventure by beloved artist Skottie Young! Pint-size heroes, giant-size action! From their top-secret treehouses in the realm of Marville, the Avengers and X-Men fight over anything and everything - from action figures to fast food to dodgeball. But when a twin brother and sister move into town, the playground becomes a battleground like never before as the two teams of super-powered kids tussle to recruit them! Will the new arrivals join Earth's Mite-iest Heroes, the Children of the Atom... or the Kindergarteners of the Galaxy?!? Plus: In the very first tale inspired by Skottie Young's variant covers, Cyclops and Captain America come to blows over Bucky the teddy bear! Collecting: Giant-Size Little Marvel: AVX (2015) 1-4, A-Babies vs. X-Babies (2012)