Operetta's Roller Skates

Operetta is an independent country diva with a flair and passion for music unmatched by any student at Monster High. Though she can be a bit uptight at times, she has a big heart and a wonderful spirit. She likes skating. When she is skating, she feels like flying and she feels herself free. Operetta uses some tools such as helmet and knee pads to protect herself in the case of accident while skating. Would you like to help her to selcet the fittest tools?