Soap bubble for its soaps in 1886 using a painting by John Everett Millais of a child playing with bubbles. The Chicago company Chemtoy began selling bubble solution in the 1940s, and bubble solution has been popular with children ever since. According to one industry estimate, retailers sell around 200 million bottles annually. A bubble is made of transparent water enclosing transparent air. However the soap film is as thin as the visible light wavelength, resulting in interferences. This creates iridescence which, together with the bubble's spherical shape and fragility, contributes to its magical effect on children and adults alike. Each colour
The Conjurer (painting) seems to exemplify the Flemish proverb: "He who lets himself be fooled by conjuring tricks loses his money and becomes the laughing stock of children." Another Flemish proverb, published and widely distributed ca 1480 in Bosch's hometown of 's-Hertogenbosch about the time of this painting, is: "No one is so much a fool as a willful fool." Bosch had used other proverbs as the basis of his painting, such as "The world is a haystack, and each man plucks from it what he can" for his painting, the Hay Wagon. Elina Gertsman's article about this painting explores this painting from