What a great ep just super heres the summarty I wrote it myself.
Arthur could not resist sweets and when he gobbled down millions of sweets, a cake produced by his father was available and Arthur did not want to waste the chance, so he engulfed enough pieces to make him fall into a crazy dream... starring Mr. Ratburn as a child-eating witch, and many other insane events.
"The Big Dig"
Grandpa Dave would now only want to sleep and play checkers. Then one day Grandpa Dave shares a secret map, and Arthur and D.W. hunt for the buried treasure.