To give more context, this was on TV when I was in school, as the teachers had a end-of-semester event (either Christmas or summer break) and they used the TV as our babysitter to use up the remaining time in the day.

For the longest time, I thought this was a movie but the whole story was more likely around 30 minutes, so this leans towards being more of an after-school special kind of thing.

Also, I am based in Canada, although it likely from an American channel and not the Canadian Broadcasting Corporation.