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
Autumn Leaves (painting) on Millais' sisters-in-law Alice and Sophy Gray, are portrayed in middle-class clothing of the era; the two on the right are in rougher, working class clothing. The painting has been seen as one of the earliest influences on the development of the aesthetic movement. The painting has typically been interpreted as a representation of the transience of youth and beauty, a common theme in Millais' art. Malcolm Warner argues that Millais was influenced by the poetry of Tennyson, at whose house he had once helped to rake together autumn leaves. Warner suggests that lines from Tennyson's song "Tears, Idle Tears"