Too hard?

Well, I haven't been able to work it out, if that's what you mean.

[rab] Chock-a-block?

OK, I'm going to do another one. Number 28. Children's TV from the 80s. Again! But also a "classical" piece. You can name either, or both for a bonus point. Oh, in the TV theme there was talking over some of this.

dumm dumm
didididi dumm dumm
didididi dumm dumm
didididi dumm da-dumm
dummm, didididi dumm, didididi -
dada-dada-dada-dada-dada-dada-dada-dada
dumm dumm
didididi dumm dumm
didididi dumm dumm
didididi dumm da-dumm
dada-didi dada-didi dada-didi dada-didi
dada-di-da da-da dya-da DAda-dada-dada-dada
DAAA-dada dada-didi
DAAA-dada dada-didi
dada-di-da da-da dya-da DAda-dada-dada-dada
DAAA-dada dada-didi
DAAA-dada dada-didi
dada-di-da da-da dya-da DAAAA
da-da-da daaa dada-dada-dada daaa
da-da-da daaa dada-dada-dada DA-
didadadum didadadum didadadum didada-
DAdadada-dadadada DAdadada-dadadada
DUMMMMMM.... BRUMMMMM.

More details on no 27. I guess part of the difficulty stems from the fact that if you ask anyone if they can hum the theme tune, the answer is generally "no". Apparantly the show was first broadcast in 1975 (a great year to be born) and was aimed at pre-school kids. Looking at websites it's claimed that it was a bit trippy. The main character was a little unconventional... sounds a bit like the Teletubbies really, but 20 years earlier (which makes one wonder what all the fuss about the Teletubbies was about).

Hope that helps!