That's quite the gap. I'd imagine the sweet spot there is the 12-13 age bracket. I started playing at 10, and I bought the core rules for my sons when the youngest was 12. Lots of gamers run games for their own kids at younger ages than that. I doubt they bought the books to do specifically that, but kids that young playing D&D isn't that rare (from my admittedly anecdotal experience). I wouldn't expect 6 and 8 year olds to watch CR, but 10 and 12 year olds wouldn't shock me at all.You honestly think the D&D core books are being aimed at kids and families? That's not my sense at all. I'd be shocked if even 10 per cent of the core books were being sold to or bought for kids under 16. Just as I'd by shocked if anything more than a tiny portion of the audience of Critical Role was 6 and 8 years olds.