many would be shocked to hear coming out of a girl's mouth.
I don't know... I don't know if it is god to actually say this. If the reader is here in the 21st century with us, s/he knows women are capable scientists and IT professionals... maybe some readers will be impressed by your interest in computer science, if they share this idea that it is rare for girls to be in this profession, but maybe you don't have to actually point out the idea.
I think you hae to base your interest in CS on something more than just the lego award and the robotics competition. Write about why CS work is what seems meaningful to you as a professional in the 21st century. Mention some intellectual interests you have, areas of the field you would like to master.