I had some trouble with the more complicated lessons as a kid and didn't always have the intended results but all in all it was cool. There were a couple of points I will complain about though. I didn't learn much about the individual components I was using and had very little idea what everything was contributing to the circuit. The second issue was there really wasn't much of a growth path if you really got into it.
I loved the kit so much my parents got me a special airport frequency radio kit. That was cool and it seemed like there would be room to grow but it was a fairly big jump in skills. I was never good with my hands and the spring connectors were gone, I think i needed to do something with soldering!
This is a very fun toy for an inquisitive kid that is easy to use even if they are not at all handy. just realize you may have to steer them through the internet to figure out what they are learning about if this is something not taught in their school.