I also had a really tall marble run installed in my bathroom for a few months for the fun of watching it whilst having a bath. My 2 bed end-of-link new build doesn't really have the space or ability for it to not be a trip hazard though and my sister doesn't remember me having it so it can't of lasted that long. Maybe one day when I have my mansion with clay pizza oven, slide to connect upstairs and downstairs like this...
If you are also a fan of the marble run you can visit the UK's biggest one that is, quite aptly, housed in "The House of Marbles" (in Bovey Tracey in Devon). Despite him thinking I was (losing my) marbles over how excited I was about reading of this attraction, an ex-boyfriend, who hadn't been there either, agreed to driving me there to ogle it (on condition I visited his parents who lived near it). I was horrified when he told me about this - how could he have lived so close to this marble museum for all those years without visiting it????!!!! So, we went, and it looks like this:-
If you want to see it in (in real life) here's their website:-
Or, someone has very kindly filmed it and put it onto youtube:-
Ahhh, reminds me of endless hours playing this with Kazmo...
And that kind of moves me onto Rube Goldberg machines.
I cannot define a Rube Goldberg machine without Wikipedia's help; so...
"A Rube Goldberg machine, contraption, invention, device, or apparatus is a deliberately over-engineered or overdone machine that performs a very simple task in a very complex fashion, usually including a chain reaction."
The U.K equivalent might be a "Heath Robinson" contraption, apparently.