My typical standard is that homemade gifts are acceptable, and the best kind really. Whether that be food (cookies) or materials (cards, collages, paintings).
But I work with a lot of kids, and they will bring me things like candy, or small toy/trinkets and I don't decline, even though technically I am breaking agency policy by accepting.
I've also received several gifts upon a last session, but I give one as well.
I understand the intent and meaning behind giving gifts so it is hard for me to decline, because I too give my own T little presents. As long as it's not over the top.