Owain wrote:

Mary Fisher wrote:

My daughters MADE tools at school (in the 70s)


I wanted to make an oscilloscope but the pocket money wouldn't stretch
much beyond a fridge alarm and an intercom system.

I built something called IIRC an electrocardioscope, when I was in my
early teens. My Dad did consulting for HeathKit, and he had me do test
builds for their new items. We got to keep the finished kits.
Great fun.

Sheila