What's the name of this kid's TV show? early 1990s in the UK - roundabout?

It was about a roundabout. It used to air with Rosie  Jim and The
Sooty show.

The man (presenter....wearing funny colourful clothes) at the end
would find a different shape each episode and plug it into the big
roundabout (this roundabout was huge and colourful).....towards the
end of the episode

Any idea? sorry if there's not enough info.

thankss