Recent content by pablito

I tried scribbling with a school pencil which sadly didn't work. Great idea. I like the sound of the putty too, I was going to look into that.

Do you happen to know which is the best insulator? Is there much difference between them?

Thanks guys, very helpful. The pencil is perfect. I just cut one open and it shows a noticeable dimming from one end to the other, and we use pencils everyday so it's a familiar object and material, easily understandable to a 9 year old. The linear potentiometer element may also be perfect...

Hello, I was wondering if anyone could tell me of an easily available (to a primary school teacher) solid material that conducts electricity, but noticeably poorly, so that it can be demonstrated and hopefully performed by 9 year olds. To be exact, I want a solid material that can be...