Otherwise, bring along whatever crafty little number you are working on at the moment.
That might be crochet, knitting, embroidery, tatting (!), macrame (!!) or granny faces made out of old dried apples……. hmm, maybe not that last one.
Or if you are completely stuck for something to do, we still have some felting kits in the cupboard along with other bits and bobs that we can dig out.