You need a reasonably sized one. My first years do different sizes- get the biggest. You'll need to fit lots of spare changes of clothes, especially when they're older and potty training.
@Sophie the biggest seems to be a medium?
@Elena this is cute where is it from ?
Honestly we've just bought normal backpacks you'd see a teenager taking to school. Fits everything in like sleeping bag etc.
@Sophie good idea
@Caitlin so cute thank you! Let’s hope so haha