We go on holiday this summer to a campsite with activities included and the way they do it is give you a wristband to wear for the whole week - one of those plasticky ones that sticks to itself, and you show it at each activity. I hate these and no way want it on all day and all night - has anyone invented a different way to wear them do you know? A strap you can take on and off to attach them to? Or a lanyard? Thanks