My daughter just turned 2. I use a Tumi backpack as a diaper bag. I am a working mom so I still carry most of my bags. Luckily most of my bags are fairly light weight and allow me to carry her and the bag when I drop her off at the daycare. The bags that I avoid are the saint laurent small sdj (I have the old version which is crazily heavy) and Chanel classic m/l. If it's just me and her going out, I usually carry the backpack with a small crossbody like Chanel Old medium Boy, Celine Trio or Mansur Gavriel mini mini bucket. My favorite work bags are LV Neverfull MM, Goyatd St Louis PM and Balenciaga City.