DieselBaby is obsessed with belugas. He loves watching/listening to "Baby Beluga" or reading his "beloo beloo" book that we got last time we went to the Shedd. The moment I walk in the door, all I hear is "beloo beloo" (so cute, but easily annoying).
The Shedd Aquarium has a special deal (probably in honor of their newest beluga). Buy an adult ticket and get one free child ticket! This is running thru March 12th so plenty of time to see the new guy.