Call Sesame Place and ask them what the best deal is out there. You may have to wait on hold for a few minutes before getting connected to a human. When i went two years ago, they told me that by bringing in a Pepsi can, i'd get something like $10 off admission for up to 4 people, and that beat any of the coupons that were floating around out there in Entertainment books, at Burger King, etc.
Papayagirl, I remember the same thing happening to me, only we got in for $10 with the Pepsi can (not a bad deal for a family of five). I will make the call, this is for a friend of mine taking her 3 year old on a limited budget.
Thanks