My nephew spent the night with us Friday night. Dane was thrilled, he loves Kelvin! Saturday morning we decided we'd head to COSI. We had been wanting to go for awhile now and it just never seemed to work out. COSI has been named the #1 Science Center in the country by Parents Magazine and it's changed ALOT since I'd been there last (which was probably 10+ years ago!) We had a great time.