Gift idea! Help 8 yo and 10 yo girls

Kougl Wife to Be!

I'm thinking about getting my nieces magazine subscriptions for their b-days...they have literally everything.  Any parents out there have suggestions on good magazines for this age group?  Both are bookworms/like school/puzzles etc.

 

Thanks! 

klondikebar

Discovery Girls, Jack and Jill, Ask

MrsGoodkat

American Girl maybe for the younger one