Grayson and the Crumbly, Grumbly, Rumbly Cookie tells the story of a little boy named Grayson who goes with his dad to a place where they sell cookies and ice cream, Grayson's two favourite treats. He orders a cookie. When he finishes eating the cookie and asks for another one, he hears a voice. Every time he asks for another cookie, the voice tells him that there is room for only one big, filling, special cookie in his tummy. Then Grayson remembers that he also likes ice cream. He eats a scoop of the tasty, yummy, cool treat and...there is no more crumbling, grumbling, or rumbling.