my kids discovered ninjago by accident recently. were very careful of what they are allowed to watch. J is 7 years old and A is 5. while on holiday i took a nap and they sneakily changed the channel and thus discovered Ninjago. Sjnce then every evening we watch it together as a family. We love it! the story line and character development is great and the bits of comedy sprinkled in between is just brilliant. I do think its important for parents with younger kids to watch with as sone of the episodes can become quite dark but overall i think its a brilliant series