ComiXology has released an app for Apple devices featuring titles for kids.  The Comics4Kids app launches with nearly 175 comics from 15 publishers:
 
Alterna Comics
Antarctic Press
Arcana Comics
Archie Comics
Bluewater Comics
Devils Due
Dynamite Entertainment
Eigo Manga
GKids (Secret of Kells)
Image Comics
Keenspot
Markosia
NBM
Red 5
Shadowline 
 
The goal of the release, according to comiXology CEO David Steinberger, was to create “an app for the kids who want to explore comics in an environment that makes their parents comfortable.”