Hand, foot and mouth disease at preschool. Should my kids just go catch it and be immune?

Probably will. Contagious virus which is harmless.Treatment is supportive.Tylenol (acetaminophen) for fever, topical antihistamines/steroids (otc) for rash, and antacids for mouth rasr.Return to school when afebrile.
Not a bad idea. A mild case may not hurt.