The other apparatus consists of a burette, beaker and stirrer. Bunsen serves as a foil for Beaker. There, they find inventor Bunsen Honeydew and his assistant Beaker. The latter attraction is a free-roving vehicle with audio-animatronics of Bunsen Honeydew and Beaker. The water from one beaker was transferred into another with taller and smaller circumference. Within the circle were post and stake holes associated with Beaker pottery and flint flakes. Here the boundary is an imaginary surface enclosing the beaker and reactants. The mass potometer consists of a plant with its root submerged in a beaker. Galicia was later influenced by the Bell Beaker culture. The presence of reactants in an open beaker is an example of an open system. The series stars Dani Harmer as protagonist Tracy Beaker. It differs from the beaker in its tapered body and narrow neck. "Bell Beaker" was introduced by John Abercromby in 1904. The series is based on The Story of Tracy Beaker by Jacqueline Wilson. It is the fourteenth series in The Story of Tracy Beaker franchise.