First, no need to ask me specifically since it is an open forum. I am sure other existing parents could help too!
The intention to put the child's photo on these items, is for them to be able to recognize their own belongings. Since most NC children may not be able to read their own names yet, so the most easily recognizable would probably be their own face!
I think the question is how to stick the photo? I know there are such products for quite some time that there are photographic paper which can be printed on with a sticky side. So they work basically like a label and can print multiple passport-sized photos on them.
Hope this can solve your wonder! At the end, if the kid has no trouble reading their own names, then there are no needs to do so.