One idea could be getting her a private lesson with a professional freestyle skiing coach. This will allow her to improve her skills while being personally coached, and will definitely elevate her skiing experience.
Another idea could be getting her a new set of freestyle skis or ski boots, either of which can enhance her performance on the slopes.
If she likes to read, you could also buy her a book about the history and techniques of freestyle skiing, or about famous freestyle skiers.
Finally, you could take her on a weekend trip to a ski resort that's famous for freestyle skiing so she can enjoy the slopes, learn from other skiers, and experience a new adventure with you.
Or you can get her a star map with the date when she was born.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.