DC Comics © May 1962, Batman #147.  The story "Batman Becomes Bat-Baby". A criminal scientist turns Batman physically into a four-year-old with a ray of his own devising, but Batman modifies his costume and continues to fight crime as Bat-Baby. 

Characters: Batman [Bruce Wayne]; Robin [Dick Grayson]; Batwoman [Kathy Kane]; Alfred Pennyworth; Commissioner James Gordon; Garth (villain, renegade scientist); Nails Finney (villain, jewel thief)); Finney's gang [Swap Smith; others unnamed) (villains)

Works by Script: Bill Finger    Pencils: Sheldon Moldoff    Inks: Charles Paris

This book appears (vg/f 52), w/ the expected nics, tics, wear and tear.  Thanks for looking.     0207-2311-52