[usgroup]

Perhaps its where I live, or the people I know, but at my kids pre-school, I suspect that few 4 year olds could play naughts and crosses to a draw. I think that sort of awareness started around 5.5-6, where it became more normal.

Gobblet Gobblers -- on a cursory look -- seems to me like a complication on top of naughts and crosses. Namely, adding the ability to mask opponent pieces, and replace existing pieces.

As a side note it seems to me that one could replicate Gobblet Gobblers by using coloured coins of 3 sizes, with the smaller coins trumping the bigger ones thereby implying stacks.