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
Pears (soap) article and under Marketing below. Following Barratt's death in April 1914 Lever Brothers took a major shareholding in A & F Pears. The takeover process was completed in 1920 and marketing and other secondary functions moved to Port Sunlight in north-west England, but production continued at Isleworth. In the mid to late 1950s each batch of soap, about 12 a day, was tested to ensure the absence of excess alkali or free fatty acid. Production moved to Port Sunlight in the 1960s when Unilever, successor to Lever Brothers, set up a cosmetic development laboratory on the Isleworth site. A major