I've heard of character breakfasts at Disneyland, but it turns out Great America offers them as well. Join some Nickelodeon character for eggs and bacon (and other breakfast grub - it's all you can eat, so fill up).
Characters include SpongeBob SquarePants and buddy Patrick, Dora the Explorer and cousin Diego, plus some I've never heard of (guess who doesn't get the Nickelodeon channel). Those would be Wanda and Cosmo from the Fairly Odd Parents, and Aang from Avatar.
Breakfast with the Nickelodeon Characters will be held in the Picnic Pavilion from 9:30am-11am on
The cost? Glad you asked. Admission plus breakfast is $53.99 (though if you have a Season/Gold/Platinum Pass, breakfast is $14.99.) You must purchase in advance.