RIP. Oliver Postgate and Peter Firmin's creations were a huge part of my childhood. My sister and I can still talk Clanger (though my husband alas never has really appreciated the one I bought him a few Christmases ago, which when pressed in the tummy says "Ooh, uh uh, uh uh uh uh uh uh," which I heard on a programme about OP actually translated as "Oh, **** it, the bloody thing's broken again." Figures.) I still like it though, as does my daughter, and every now and then we release him from his cupboard and let him speak. The Clanger I mean, not my husband.
One of the very first things OH and I bought together was a Noggin the Nog video, which we still have, though it must be, gasp, at least 20 years old now. Gosh. The children loved it too. I can really appreciate now, watching it again, how masterful it was: the atmospheric music, and the effective and utterly unflashy animation, but most of all the story.