What you need to prepare
Paper, a needle and an eraser.
Cut a strip of paper the width of 1-2 cm and a length of 10-15 cm, Sogni around the edges and in the middle, as shown in the figure. Stick a needle sharp end into the eraser. Ravnovesie the workpiece on the needle.
Prepare a magic wand, Portree on a dry cloth and held it to one of the ends of the paper strip on the side or top, not touching her.
The bar will turn to swing up and down, swings, or will be spinning like a carousel.
And if you can cut from thin paper butterfly, the experience will be even more interesting.