Maglev trains. As a boy in the 1960s I'd obviously seen how with magnets the like poles would repel each other and wondered if that could lead to frictionless transport. Then in my teens I dabbled with electronics as a hobby (any other 70s kids remember Phillips Electronic kits?) and tried to build a magnetic track along which a train could 'float'. However it was beyond my childish skills and the very best I achieved was having the train just floating there with no forward momentum.
However it was my idea. Can I have some money now please?
However it was my idea. Can I have some money now please?