The self-proclaimed Plastic Bag Ladies of the Sea invite you into their cosy underwater home on the edge of the Cultural Centre Wetland for Spinning a Yarn, a quirky and surprisingly insightful half hour show.

The environmentally conscious message of the performance is incredibly relevant to the wider debate occurring around global warming, but is delivered in a measured and satisfyingly strange dose of storytelling. Spinning a Yarn won’t be for everyone, as it relies on its intimate and interactive relationship with the audience, but is a very good show for anyone with an open mind.

The show begins with a quick tea party and a brief lesson in knitting with plastic. It’s all very peculiar but worth embracing. At the heart of the performance is the tale of turtle and monkey, two unlikely friends whose fates change each performance depending on what the audience chose. At times you wonder where the story is heading, especially when the actions moves to an underwater disco scene, but just as quickly as their eccentric storytelling entraps you the reality of the situation will shock you back to life.

Their underwater garden is a truly visual feast, layered in knitted treasures, recycled plastic and a whole array of surprising features. It’s easy to forget the outside world and find yourself amazed at the textures and colours on display.

From their self-aware silliness, to their buckets of knowledge and obvious enjoyment, the alter-egos of Dr Susan Williamson and Simone O’Brien are incredibly likely and strange. The effectiveness of the piece depends on Mrs Polly Mer and Polly Ester coming across as entertaining instead of preachy. This is exactly what they succeed at and including the audience in the outcome makes us feel equally as responsible. The performance is incredibly intimate, with a maximum of eight audience members allowed. This not only helps to reduce their carbon footprint, but gives Williamson and O’Brien the opportunity to connect with the audience members through group activities and casual conversation.

Spinning a Yarn feels right at home as part of the Fringe Festival and with multiple evening performances over three weeks, there is plenty of time to catch the show. It is offbeat enough to capture your attention, quirky enough for you to enjoy and grounded in such a simple message that it’s hard not to leave Mrs Polly Mer and Polly Ester’s underwater world without wanting to make a difference.