Uses for tracks in 9648 Has anyone used the Tank tracks (429139) from Lego education set 9648 for anything other than a tank?

The tracks are fixed in size, and I've found the application rather limited (driver belt, track) so far.

At this stage they seem to be a bit of a novelty - so any feedback welcome!
My FIRST LEGO League team likes to use them as clothing accessories, like belts, headbands, sashes, etc.

More commonly, though, they are used for conveyor belts (for example, in a great ball contraption). You can also use them for a chain drive when 3711 is not strong enough or big enough.

I also saw this recently where small carriages were attached to the links and it was used as a vertical parking system for matchbox cars.