Seaworld almost ALWAYS has a promo going of 2nd day free. You take your ticket stub to the CS booth inside the gates for validation. So, don't buy for 2 days unless you want 4 days!
I see you are in PA and have younger kids. Why not take a look the Grover Season pass via Seasame Place?
There are countless benefits to being a Season Pass Member. Purchase between 11/3/08 - 5/1/09 $159.95
Purchase between 5/1/09 - 7/3/09 $169.95
Your Sesame Place Season Pass is your key to the park - on your schedule. Stay for the day, stay for a couple of hours. With a Pass in your pocket, you can drop by as often as you'd like, any time you'd like.
Super Grover Season Pass
Admission:
Unlimited admission to Sesame Place
Unlimited admission to SeaWorld, Aquatica & Busch Gardens through 12/31/09 1
Special Offers at Discovery Cove 2
$199 Dolphin Swim; $99 Non-Dolphin Swim.
$10 off admission on single-day tickets for visiting friends & family
Valid for up to six tickets. Prices and products subject to change.
Parking
Free Preferred or General Parking at Sesame Place
Food
10% discount on Dine with Big Bird & Friends open for breakfast, lunch and dinner
New: 30% discount on all food at Sesame Place
Kids eat free at Dine with Big Bird & Friends! For each adult dinner purchased, receive one child dinner free. Call 1-866-GO-4-ELMO for reservations.
Merchandise
30% discount on all merchandise at Sesame Place
Extras
Ride Again Privileges at Sesame Place 3
Sesame Street Character Meet & Greets 4
Preferred seating at Big Bird Theater & Abbys Paradise Theater 5
Admission to Exclusive Pass Member Events
Complimentary Membership Lanyard (while supplies last)
$8 admission rate to Trenton Thunder Baseball Games