You could make desktop post-it note holders. Get plain, clear, acrylic picture frames. The kind that are just bent at the bottom to stand up and are just sort of "folded" over themselves so all you do is slip a picture in between the two layers of acrylic. Get either 3 x 5 or 4 x6.
Instead of a picture you stamp a piece of paper to fit in the space and then attach a pad of post-it notes to the top, maybe in a bright color to match the ink you use on your stamped piece. Or instead of post it notes you could attach a mini calendar. The whole thing sits on the desktop at angle, kind of like a keyboard for a computer would. Hope this makes sense. I made these a few a years ago, but don't have picture of one. I'll go look in the gallery see if I can find what I am talking about.
Here's one:
Teacher gifts for Easter by Kerryann96818 at Splitcoaststampers