Motor speed controller for Kally 1SM?

[Rupert Lucius]

Mr. Ken, referring our discussion concerning DC motors, I would like to mention, that I have just ordered an electrical construction set for my 8 years old grandson.


 
More than half century ago I was experimenting with exactly the same toy. I'm looking forward to return to it again.

I, will follow you and order said set for my Grandson Ian who just turned 7.

Thanks
Rupert