Any info on height requirements/restrictions? What about motion issues? We are going to WDW in August with another family and thought we might take a day for this, but if the kids will not make the height, or if it is too scary (confined by a harness, or something) we might not want to mention this. They are 10, 8 and 7 (and a baby that I am sure can't go of course...). They are over 48" (but not 52" for at least one of them). Looks like a motion sick inducing thing for me though (iMax gives me issues), so DH would have to take them.