I bought this for a trip, hoping the case would help prevent my son from losing his crayons. It worked pretty well. He cannot open it easily, so he could only spill them when I had opened it for him. He did that a few times, but we only lost one crayon. The crayons are sturdy and write smoothly. My son tends to break crayons in half deliberately, but he didn't break any of these so far. He enjoyed playing with the truck, which resulted in a few spills if I didn't close it first.