Did your kids get their teeth at different ages?
My first baby got her first tooth at 10 months, so naturally I didn't expect my second baby to get any teeth until then. But she's 4 months now and she's been crying and crying for seemingly no reason. But when her mouth was open, I'll be darned... I think I saw some teeth popping in. That would explain that. What ages did your kids start to get teeth? Were they about the same age?