The girls have well and truly joined in the loom band craze that's sweeping Britain. It's basically crochet, but can get very complex.
An American Malaysian of Chinese descent, Cheong Choon Ng, invented it in Michigan in 2011. Its complexity meant that it didn't catch on for a couple of years, until he struck on the idea of his daughters and nieces doing video demos on YouTube. I am now the proud owner of four (thankfully fairly manly) rubber bracelets, while Liz has them coming up to her elbow in a multitude of colours.
I approve: it's creative, good for dexterity and keeps them off gadgets.