Thanks for the ideas! Keep them coming. We will definitely travel and experience some place new, and that will be a huge part of DS's education that year. My wife and will need to be working full time while on sabbatical, so full homeschooling is probably not an option. International schools are very pricy and often too small to have a dedicated GT classroom. DS has never met an intellectual peer his own age and we'd love if that happened in our sabbatical year.