Only downside: it is difficult to open, even for an adult (must press hard in two places simultaneously and you need 2 hands to do so), but hey, it's part of his job to be difficult to open ! :)
PS: looking at the photo, I imagined that the curls were soft and circular (like a thick wire to extend the machine), but it is not so: it is a kind of tape (7 mm wide) plastic.
