As it turns out, not every day is an "A-OK sunny day" on Sesame Street, as the show's theme song sings. At least, not for the Elmo portrayed on a hilarious custom cake that's been circulating online.

A Maine toddler’s birthday party was cancelled after his dad discovered a knife in his Elmo cake. Nathan Bibeau, of Lewiston, said he was furious on finding the blade in the pastry bought for his ...