Maybe some decorative hair sticks (the ones often confused for "chop sticks," but are are used to eat with at all.)
Oo! A monocle! That has a little button where the chain meets the glass? Or just sunglasses/glasses that have a little button
Armband with what looks like a jewel but is really the activation and either changes colors/shape/glows/something like that?
A key chain? You can have a hay day with those
A flash light? They come in small sizes, and many styles.
A small hat with some kind of accouterment on it that can be pressed?
Those are all I can come up with now. A pill box? They have buttons sometimes. Open it and 7 days a week of magic! (Okay, I'm joking there...but still...)