I've got all three of those too - had to go to a few second hand stores til I found them, and they're all different editions (though really, who cares). There's a few projects in there that I think my son would really enjoy. Our doorbell recently died so I thought maybe he and I could build the doorbell project one weekend.

I remember going to Dick Smith when I was little and being so intrigued by all those electronic components, but there wasn't anyone in my family who was into electronics so my interest never went anywhere, sadly.