The Grillz! Oh my goodness this is so adorable and special. My kids just light up with this backpack and think the mouth is the coolest ever. It's friendly looking enough for younger kids, but cool enough for middle school kids. Maybe high school if your kiddo has a good sense of humor. I think if a teacher used this the kids would think they were extra awesome. It's made well, hold a standard amount for a backpack, has good straps for shoulders and a small strap if you want to carry it will your fingers. Overall, it's a good backpack and we have not had any issues with the zippers. The Grill is fun and anything fun for school is an Aplus from me.