Hoo diddy and a wowza! In for all six! Maybe I'll be driving myself crazy when my 4 little local g'kids come over -- dealing with that interchangeable puzzle piece issue. But, whatever. Maybe I'll just scream at them and force them to only get one puzzle out at a time, and oh yeah, be sure that they put that one away in the box before getting out the next one. Yeah, that'll work. I'll scream at them. Keep things straight.