I had Legos, K'nex, Meccano, a lot of Legos, Capsellas, lose PVC pipes I screwed around with in the bath, some roller coaster ball thing I forgot the name of, two spaceship things featured in Lego mag, and probably another modular toy system I forgot about.

Capsela was really cool, but I mostly remember that the tolerances or the connectors were loose enough that some didn't connect properly, and some other just stuck together forever.

And now I program.

Correlation not causation, but...