Why we may always be part of the latest craze

David loves to spin.  He spins toys, wheels, lights and particularly enjoys whole body spinning himself akin to a figure skater.  He'll spin when he's excited and sometimes spin his fingers near his eyes too.   He spins at home, at the playground, on days out and even in the odd restaurant.   And then in the same restaurant he may stand mesmerised by a spinning fan that's just meant to be keeping the patrons cool. Sometimes it's a reaction to having fun, being excited and sometimes it's about being calm.