Miles and Vivienne are sitting up extremely well now. Only about 2 weeks ago, they could only sit up for a couple minutes before they would fall to their sides or backwards. Now, they can sit for over 30 minutes at a time without losing their balance. It has been amazing to see how quickly they are gaining strength and coordination.
Yesterday, my mom and I went to Walmart, and the babies each rode in a shopping cart for the very first time. Next stop... the DMV. =)