I have 5 tamagotchis (ok, so I have 6, but I can't find the mini), and I bring them ALL to school. Every day. My mom is my teacher, and she knows how obsessed I am with tamagotchis, so she lets everyone bring theirs. There is always a "tamagotchi convention" at recess. And besides, the school I go to has high expectations for its students, so they expect us to put work in front of tamagotchis. So, I set the time to their bed times when I'm working, and wake them up at recess, and put them back to sleep after recess, and wake them up at after-care, and take them home, etc.
P.S. At my school, we bring our own lunches.