If you live around here or if you are coming early or staying after ScienceOnline'09, you may be interested in science/nature stuff you can see around here. I know, it's January and some of those facilities are not at their rose-blooming peak, but they are worth a look:
Take a look at the awesome North Carolina Museum of Natural Sciences in Raleigh, Museum of Life and Science in Durham, Hemlock Bluffs Nature Preserve and Stevens Science Center in Cary, Morehead Planetarium and Science Center in Chapel Hill and JC Raulston Arboretum in Raleigh.
I'd also add NC Botanical Garden in Chapel Hill, Sarah P. Duke Gardens in Durham, The Science House at North Carolina State University in Raleigh, Carnivore Preservation Trust in Pittsboro and the fantastic NC Zoo in Asheboro.
Not just for kids - adults will love all of this as well.