Soap bubble into college years. A Swiss university professor, Dr. Natalie Hartzell, has theorized that usage of artificial bubbles for entertainment purposes of young children has shown a positive effect in the region of the child's brain that controls motor skills and is responsible for coordination with children exposed to bubbles at a young age showing measurably better motion skills than those who were not. Soap bubbles have been used as entertainment for at least 400 years, as evidenced by 17th-century Flemish paintings showing children blowing bubbles with clay pipes. The London-based firm A. & F. Pears created a famous advertising campaign
The North-West Passage was promoting at the time. The female figure was a professional model, Mrs Ellis, who was later used in another painting, "Stitch, Stitch, Stitch" (1876). The right side of the painting originally depicted two of the sailor's grandchildren, who were modelled by John and Alice Millais, two of Millais' own children. They were shown looking at a globe of the world. But after Millais completed the painting, he became unhappy with the figures of the children, thinking that they distracted the eye from the main figure. He cut out this section of the painting and replaced it with a screen,