We do not know who blew the first soap bubble, but they appeared in Flemish paintings during the 17th century. During the 1865 holiday season, A. Ladd manufactured and marketed a toy bubble solution based on the scientific solution invented by Belgian scientist Joseph Plateau. Alfred Bird, an English food manufacturer and chemist, marketed the Rainbow Bubble solution just a year later. “The Pharmaceutical Journal and Transactions, Volume 8” touted the Rainbow Bubble noting that it made “magnificent spheres, 24 inches in circumference, and the most gorgeous prismatic colors.” A 1929 advertisement for the Mary Lu Bubble Set noted "down in the soap...b-l-o-w...and have a beautiful rainbow tinted bubble to toss in the air!" The set included two clay pipes, a glass bowl, and four tubes of various colored soap powders and sold for 98 cents.