I've been on a mission today to find a (cheap) flexible length of pipe or channelling that can be used to create a loop the loop marble run section.
I've been to B&Q and the like, but nothing I've found is bendy enough to create a proper loop, or it's a pipe but too small for a marble to run freely, or it's the right size but costs £30.
I'm stumped now- any ideas on something I can use instead? It needs to be tabletop sized. Thanks!