[dan-robertson]

Not sure that sculpting clay is the best analogy. Lots of sculpting is hard, as is turning clay, especially if you want to successfully fire the result. Maybe it is an accurate analogy, but people may understand the difficulty differently.

[bombcar]

Hypercard is more like Lego - you can simply buy completed sets (use other's hypercard programs) - or you can put together things according to instructions - but you can always take them apart and change them, and eventually build your own.