You're a parental-type gentleman, so I would like your advice: I want to introduce my boss' daughters, 6 and 8, to RWBY, but I'm not sure if it's kid friendly enough. Should I give it a shot?
My ten-year old son looooooves it, and I am perfectly fine showing it to him. I would think 6 and 8 works as well, depending on how much the parents tolerate fighting stuff and violence against monsters. My four-year old really likes it, mostly because his big brother does, but there are a few moments with the creatures of Grimm that startled him.