I had forgotten this until I just saw your post, but in the first grade I had my mother bring in our chicks for Show and Tell. Do they still do Show and Tell? I used to love that. Well, the chicks were a huge hit. The teacher made sure everyone was gentle, and my mom stayed long enough for show and tell, and then brought the chicks right back home. Things were a little (a lot) more laid back then, but I don't see why it would be a bad thing. Just have everyone wash their hands afterward as others have said and don't let kids be rough. I remember suddenly being the popular kid that week!