This day pack has 4 different size compartments:one main compartment, two medium-sized middle compartments and a small front compartment. Inside the main compartment, there are a laptop compartment and a small zippered pouch for small things. These provide roomy space for storage. Most of kids' daily necessities can be loaded, such as laptop,folder,water bottle,notebook,lunch box,extra clothes,etc. Plus, there are 2 mesh side pockets used as water bottle holder. Those different compartments and pockets will help keep children organized.