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It was probably one of the Turtle robots or a derivative of them: https://en.wikipedia.org/wiki/Turtle_(robot)

One later variant is the Valiant Roamer https://www.computinghistory.org.uk/det/30545/Valiant-Roamer...

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We had the Roamer, British school, very early 90's.

I remember programming a logo/turtle type thing on the BBC Micro, and then I think there was a way to copy the program on to the Roamer directly from the BBC. Or maybe we did it manually. But it was amazing to me, and I always felt sad we didnt use it more!

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Yes, I remember. See anything familiar on https://www.weeklyrobotics.com/articles/2023_01_25_the_histo...
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Did it look like this:

https://en.wikipedia.org/wiki/Big_Trak

Doesn't have a pen, but maybe it was a modified version of that toy?

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YES! This was exactly it. Thank you.

It seems my pen memory came from a different logo-driven bot. In-fact, the Big Trak was not even Logo-driven, but had a similar command system.

I appear to have combined childhood recollections, but that was the shape I was "remembering." No wonder, just look at that thing! lol

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