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
Thomas J. Barratt as Barratt had acquired the copyright. Barratt followed this with a series of advertisements inspired by Millais' painting, portraying cute children in idealized middle-class homes, associating Pears with social aspiration and domestic comfort. Barratt also made effective use of testimonials, recruiting both scientists and glamorous high-society figures. He also established "Pears Annual" in 1891, in which he promoted contemporary illustration and colour printing. In 1897, he added "Pears Cyclopedia", a single volume encyclopedia. Barratt's methods led to much comment and parody, most famously a Harry Furniss Punch cartoon in which a tramp says "I used your soap two years ago,