Needle Felting and Advice Please.

This is Business Bunny. He was made over the last two evenings when I suddenly had the need to needle felt. He has a little briefcase where he keeps his rabbit money, but is waiting for a basket of eggs to take to the Easter market. 

The advice is work related-but not in the recent way of work related posts on here, with which I am boring even myself! No, it is about a little visitor I have to the basket with the parachute in it which lives outside my classroom door. It is a little male tabby cat I am already thinking of as Tommy. (There is so much on the telly about the first world war at the moment that it just popped into my head-and of course Tom cat-I am so unoriginal!) He has been appearing since we went back to school. He seems to be sleeping in the basket (which has now had the parachute removed as it smelled of cat wee-but I put a blanket there for him instead) as he leaps out of it when I get to school and also has appeared before I have gone home at night. At first I thought he looked quite healthy, but on closer inspection looks very thin. Apparently he turned up in the day today, and John, the other teacher, said he had also seen him in the kids' tent. I bet you can guess what the advice is can't you? I am worried about him and basically want to bring him home. Obviously there are great difficulties in this with the girls and with actually making friends with him and persuading him to come home. I can't see it really happening but I don't know what to do for the best. I don't want to start feeding him so that he relies on me but am not sure how else I would entice him home. I might get the teachers of the older kids to ask their classes if anyone knows if he belongs to anyone. The nearest houses in both directions are not that far and I know male cats tend to roam, it is just the fact that he is sleeping there. Why would he do that if he had a lovely warm home to go to? Any ideas about how to proceed would be gratefully received!