This is the first episode of the new "Powerpuff Girls, the mathemusical" or Powerpuff girls 2. It's called Ocean, the musical.
The powerpuff girls are in their new math headquarters waiting for the viewer to arrive. The camera gets close up to the blue window that looks like a 6 and we see the powerpuff girls playing hopscotch. They see the viewer and greet them and introduce themselves and explain that their new clubhouse looks like a 1 and is white with a green roof. Bubbles states that the powerpuff girls will teach basic math skills like numbers, counting, and sorting by color and shape.