Mine (10 and 12) have First News and really benefit from it. They've had it for a couple of years now and their general knowledge and ability to talk and debate knowledgeably about world affairs has really improved (appreciate that might not be what you're going for but its a definite plus).
struggling you might want to look at marvelunlimited for your DC. Its web based but you get access to every marvel comic/graphic novel ever published. Works out cheaper than the Avengers graphic novel subscription. DS1 (12) adores it.