My little sister wants a wand?

My little sister is so in love with the show Wizards of Waverly place. She is really interested in Alex's wand. So the problem is she keeps bugging my mom and me for a play one. So I have come to the point where I can't take it anymore and just decided to take her to get one. But I don't know where to get one though. She is not like three years old she is seven. Where can I get a wand?