Super Juniors are a group of fictional DC Comics characters based on members of the Justice League of America, designed as baby versions in order to appeal to younger audiences and introduce them to the publisher's most popular properties. At Kenner's request, first appeared in José Luis García-López' 1982 DC Comics Style Guide and had their first and only adventure in Super Jrs. Holiday Special: Best of Blue Ribbon Digest Series #58 (1984); however, there was a considerable amount of merchandise (toys, wallpapers, bed sheets and covers, furniture, flash cards, coloring books, etc.) based on them.
Characters include "Jr." versions of Superman (Super-Kid, Casey), Batman (Bat-Guy, Carlos) and Robin (Kid-Robin, the Shrimp), Wonder Woman (Wonder Tot, Deedee), Flash (Flash-Kid, Rembrandt), Green Arrow, Green Lantern, Hawkman, Aquaman and, later, Supergirl. In the Holiday Special, they are orphan youngsters from the Miss Piffle's Nursery School, transformed by the fairy spirit of Christmas into superheroes to stop the evil Wallace van Whealthy III, the Weather Wizard, a school bully super villain and rescue Santa Claus.
In Wonder Woman #105 (April 1959), Wonder Tot was introduced as Wonder Woman during her younger years. Through magic, the child was able to co-exist alongside her older self without any ramifications. Befriending Mister Genie (Genro), she would return infrequently over the years that followed in her own adventures.
In Action Comics #260 (January 1960), Supergirl is reduced in age when she comes into contact with a pool of water upon saving an old man.