Most teens use planners or calendars compatible with smart phones. Can't go wrong with ITunes or google play gift card

Happy Planners have their own website: http://shop.meandmybigideas.com/collections/planner-basics

Michael's has fancy planner stuff on sale right now. They have a gold and mint green set that I bought a friend's 15 year old.

Maybe a carrying case? Check Facebook for planner fan groups - you could get some ideas there.

^ washi tape

Stickers, was hi tape, colored pens and highlighters - goes with any planner

She has a regular sized happy planner. What accessories / packs can I buy her for under $40. I looked up etsy items but mostly found Erin Conrad size items for planners.