Thanks mamacat! We've actually been very lucky that he's only been majorly sick a couple of times, all other ones were just colds, we've even managed to keep him from getting noro when me and DH both had it (we lived near my parents then). So I'd feel terrible if we all ended up sick now from the preschool. I'm really going back and forth on this one, and kind of regretting tellin the owner we'd start...I'm thinking maybe saying our circumstances changed and we're no longer able to attend...on the other hand, of course if I knew he wasn't gonna get sick, it'd be a good experience for both of us...urrg, don't know...