I used to be good at this stuff, as I used to collect. This is for my niece's 7 year old girl. Thanks Tank. I will pass those on.
If you're cool with indie publishers, we have a niece who utterly adored APE Entertainment's recent Strawberry Shortcake comics, a few issues of which we bought her at a con from one of its writers.
It's my understanding that IDW's My Little Pony line has a pretty healthy following, too.
And I second Tank's recommendation of Roger Langridge's Muppets comics. Marvel will be reprinting all of those in a single omnibus soon, but the individual trades should still be out there.
If it has to be super-heroes, though...well, outside of back issues and old digests (which are largely fine, mind you), in terms of ongoing comics the dwindling kiddie market is one of the few areas in which DC currently beats Marvel for variety.
Edited by NumberSix, 09 March 2014 - 10:47 AM.