[TOMT] [Live Action TV Show] [Mid 90s or earlier] - Trying to find a Live Action Educational TV Show for Children from the mid 90s or earlier with a boxy robot that explained science and engineering

I'm trying to identify a Live Action Educational Science Series I remember watching in the early to mid 90s, but it might have been made before that.

• I'm sure it was on a UK satelite Channel called The Children' Channel. I've looked at the list of programmes on this channel though and couldn't find it, so it might have been from another channel.
• It featured a boxy robot I'm sure was called 'Conrad' or 'Comrade'.
• There was a song with non-English words which also contained his name.
• The programme was in English or dubbed.
• It featured the robot explaining various science and engineering concepts to children with examples and experiments.

That's about all I remember.