This activity was run by Gina Schreck at the CAPS convention in Vancouver. All you need is coloured wool cut into lengths with a loop at each end.
It can get quite physical with people trying to climb under, over, or behind each other.
You can use it to draw out lessons about creativity and lateral thinking, for example.
The video shows the problem being solved by Shirley Taylor from Asia Professional Speakers and Maggie Georgopolous from PSA UK.
Want ideas for your own speech or workshop?