So cool that your sister is studying engineering! That tends to be a very male dominated field and so it would be interesting to see what kind of content she creates and how she could share some of her knowledge! It is a lot of work though - so I totally get that she is busy!
Also, I just want to say that i'm really sorry it took me so long to reply! I got a little behind on replying to comments and want you to know how excited I am that you entered this giveaway! I will be posting the winners later today! :)