I also had these when I was a kid (and Legos, K'Nex, Erector sets, model car kits, etc). These didn't have as much of an impact on me as some of the other toys

I also had these when I was a kid (and Legos, K'Nex, Erector sets, model car kits, etc). These didn't have as much of an impact on me as some of the other toys. There isn't really as much flexibility as there is with sets like Legos or K'Nex.