I had a million of those when I was a kid, and they were fun, but I can't say I learned much from them. They're great for "follow these simple instructions and you can build a device that does X", but I couldn't tell you why he picked a PNP or NPN transistor if my life depended on it.
In fact, the first book on that page is called "Getting Started in Electronics" (he's actually a prolific author); between that book, the mini-notebooks, and AOE - that would be a great set for an electronics education.
