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) developed immunity to the effects of breathing the alcohol-laden atmosphere in the building. The concave shape of the soap is formed by shrinkage while the soap is drying, and is not due to deliberate moulding. Bars of soap produced in the factory come in two sizes: 75 g and 125 g. Nowadays this soap comes in three colours: the classic amber, the green, and mint (blue colour). Each variety has a unique aroma. The soap now comes in two new sizes: 69 g and 119 g. Recent changes to quality of ingredients used in the manufacturing process (see "Changes to