Not a fan of the 529.......it isn't very liquid. That said, it isn't an awful idea. If I was young again, and had young kids, I'd be buying rental properties, and gifting them 10K a year of the value. Then, when they need the money, they can either use the rent, or sell the places. But, that ship has largely sailed for me.....though maybe not..... *not advice, just what I'd do.....