I thought this was going to take me back to my spirograph days but unfortunately, it's not quite as fun. The string is really fiddly to get onto the plastic hooks at the start of each thread and once you have used a piece of plastic (it only comes with two) you either commit to whatever you've made and lose the piece of plastic, or you have to painstakinly unthread your work and start a new design. It'd be better if it came with dozens of cardboard variants so you could make more than one thing and not have to undo.
However, the fact lots of straight lines makes a pretty curve never fails to impress me and I enjoyed being creative. Even if it was aimed at kids!