*snaps fingers*Children's Film Foundation! Am I right?
It could be something in that area, or the Tomorrow People?
These would seem to be Nerva Beacon transmat receptors from solar flare-ravaged far-future Earth.
Here you go:http://www.youtube.com/watch?v=Rwib_dTDSGU
Yes, that must be it. I'd forgotten about 'Glitterball', but now I'm sure I saw it as a child. Nice one. I don't rule out the Nerva Beacon hypothesis though.
You should NEVER rule out the Nerva Beacon hypothesis.