Went to our local AAA office and joined, which I had been meaning to do anyway (have a daughter in college). So I bought the certificates from them, two with swims and two without (DH and 15-year-old DD don't want to), at a savings of about $30, which paid for my daughter's AAA membership. Then came home and called Discovery Cove. You give them the certificate numbers and they give you your confirmation number for your reservation. They only have an certain allottment of admissions on any given day for AAA members, so keep that in mind. Luckily, they had admissions left for Sunday, May 25, so we're booked! I can't believe I'm finally going to do this!