I had one of those when I was maybe 8. Got some enjoyment out of it, and then a couple years later I got RadioShack's Electronic Learning Lab, which was much more advanced. After receiving and opening it, I was actually in tears (IIRC) because it looked so complicated and I didn't even know how to get a wire into the breadboard.

That ELL gave me probably 100s of hours of fun and learning over the next 5 years.