dancing paper dolls with magnets
When in Europe, I saw a street vender that stood near his little boom box and had 2 dancing paper dolls next to it. I bought the paper dolls and now need to figure out what he did to his speakers or magnets in his speaker to create this illusion of dancing dolls that can dance next to a boom box. The dolls had magnets on the backs of them, so it had something to do with a magnet inside his boombox.
Can you help? Thank you.