Another tooth for Addison!

On our plane ride back to DC yesterday (during which the babies were TOTAL angels, their best flight yet--they slept, ate, played, smiled, laughed, and were generally the best babies ever--Addison did a lot of pee-weeing and we had to change her outfit on the plane, but that was our only mid-flight incident), Mary thought she saw a second tooth coming in on Addison's lower gums...and she was right! Both babies now have two bottom teeth working their way in.

**Is it the normal course of baby teeth to come in two at a time?! Both our babies have gotten their second tooth within days of getting their first tooth...