There could be an item that allows taking photos of things and yeens. It would be fun, but also it might be useful, you could take a picture of a number so you don't forget.
The photos would appear as kinda small physical objects (but no collision with players), maybe you could pin them to the blackboard.
#Polaroid item
stiff depot
kind cloud
i actually though about this item when making the camera, i might make it print out the picture, the problem is the networking of the image xD (if you join late)