I have been surprised and amazed at how quickly ten year olds can pick up spinning on a wheel, so don't think it all has to be drop spindles made of a potato on a stick. An Ashford Traddie wheel with someone to show them what to do, then brave enough to let them get on with it, can lead to a hooked spinner
One of the things I think really attracts attention is a touchy-feely place, where people can handle as much fleece, knitting and weaving as they want to, and work out for themselves how raw wool 'works' by pulling and twisting for themselves, not just watching a demo.
Many young people today don't know what spinning, knitting, crochet and weaving are. I find people of all ages are utterly amazed to find that most of the clothes they are wearing are knitted or woven, albeit of cotton or man-made fibres - their jeans are spun and woven, their T-shirts are spun and knitted, the uppers of their trainers are spun and woven. Pictures of the processes on a factory scale to compare with hand production can be an eye opener.
Above all, obviously it needs to be fun, full of
colour and excitement, with several 'helpers' to lead people's interest and help interpret what's on offer.
Nothing whacky there, but I'm sure everyone else will be bursting with great ideas.