Adult to Child T-Shirt

Okay, I don't know how to do this sort of stuff yet, but can someone convert these t-shirts to children? I don't know if the creator has any obligations to this since she has been inactive from Tumblr for 3 weeks at the time I'm posting this.  Link: rickeygirl24.tumblr.com/post/122035314562/attack-on-titan-shirts-for-both-female-male-for