These bracelets are super fun to make and to wear!  I'm way older than their intended market (I'm 23), but I still love them, and they're easy enough to make and wear that I'm sure their target market (ages 8 and up) could make them without much trouble.  Even my 20-year-old sister had to admit that the novelty aspect of being able to make stretchy bracelets like these, and fastening the flat strips into bracelets simply by sticking the ends together and wearing them for a few minutes (they permanently fuse after about 15 minutes of being warmed by body heat) is cool, even though she wouldn't be caught dead in a home-made brightly colored shiny bracelet.  My only complaints are that it only comes with four of the plastic strips to put the gel on (I want to do more at once, without waiting for them to dry first, although it's probably just as well that I couldn't use up all the gel in one go), the plastic strips aren't long enough to make an ankle bracelet (at least for an adult), and so far the refill sets only come with the same four colors of gel (judging by other Klutz products though, if these do well enough they'll start selling more colors eventually).