Yup. Your HA is fine. This HA challenge doesn't really any limitations. You can make a HA showcasing a hobby, club, sport or even a study group. :)

[img align=left]https://i19.photobucket.com/albums/b174/theatticbox/kain2.png[/img] earned 10 points for Gryffindor! earned 10 points for Hufflepuff! earned 10 points for Gryffindor! earned 10 points for Slytherin! earned 10 points for Ravenclaw! earned 10 points for Ravenclaw! earned 10 points for Hufflepuff! earned 10 points for Slytherin! earned 10 points for Ravenclaw! earned 10 points for Ravenclaw! earned 10 points for Slytherin! earned 10 points for Slytherin! earned 10 points for Slytherin! earned 10 points for Slytherin! earned 10 points for Ravenclaw! earned 10 points for Gryffindor! earned 10 points for Hufflepuff! earned 10 points for Slytherin! earned 10 points for Hufflepuff! earned 10 points for Hufflepuff! earned 10 points for Ravenclaw! earned 10 points for Gryffindor! earned 10 points for Slytherin! earned 10 points for Hufflepuff!

and earned 5 extra points.