to Barnes and Noble or the local movie theater or some other fun thing/nice store.
As nephew and nieces have grown (now mostly all teens) I just send them each a $20 bill. It's always the "right" size and they love the color.
Sometimes I've given nice mittens/gloves - I think it's a thoughtful AND practical gift, although not really a "WOW!!" gift.
My friend gave plants one year, wrapped in a bow. I've given teachers a nice poinsettia plant -- or something else that ppl just might not buy for themselves . . . Oh, how about a gift cert. for See's Candy (or whatever confectionary is popular in your area)?
Good luck! I'm curious to see what others suggest ! !