Having been a child of the BBC Micro which lead to a career in Computing, initially on the physical side, the CamJam EduKit range seemed a non threatening reintroduction to physical IO. I found the EduKit 1 satisfying so moved onto the EduKit 2 and was not disappointed.
The kits contain everything needed to complete the experiments which are presented in a clear, easy to understand format with each building on previous playtimes! While basic, they are reliable in that following the directions results in a reliably working example. Then the real fun begins in playing around with it.
The only minor enhancement I would suggest would be the inclusion of a list of further quality online resources that complement the learning objectives.