4 + 3 = 8?

Whoops! That's not right.

Looks like a job for the eraserheads! The three eraserheads - an owl, a crocodile, and a pig - live atop three pencils in the land of paper, rulers, letters, and numbers. Their job is to help a little boy correct his mistakes. But one day they make a mistake of their own - and what happens next is something nobody expected.