First, Ruffy counts forward to 15 to demonstrate mastery of numbers in a fun, educational activity designed for children. And then, he exclaims "Yahoo!" to celebrate successfully reaching the target number and completing the counting exercise.
Ruffy is angry and exclaims, "Not cool, Timmy and Finlay, not cool!" because Timmy and Finlay knocked down the impressive block tower he had carefully built. Harriet sends Timmy and Finlay to the naughty stump as a timeout for their disruptive behavior and for failing to respect their friend's hard work.
