[OT] Lego mechanical calculators Re: Has anyone build a set of gears in Etoys or any other freely available program?

On Friday, Steve Thomas wrote:

> So I want to get them to try and build some adding machines (and I will see
> if we can find enough lego parts amonst us to do that as it would be best),...

Steve, You or your students might find this useful:

http://www.amblesideprimary.com/ambleweb/legocomputers/computer.htm

David
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