Sindy boyfriend Paul was released in 1965, and her younger sister Patch in 1966. Sindy's friends Vicki and Mitzi, and Patch's friends Poppet and Betsy debuted in 1968. Sindy was the best selling toy in Britain in 1968 and 1970. Sindy's success in the 1960s was partly due to the increasing range of accessories, with up to 70% of Sindy's turnover from sales of accessories. Mattel did not greatly expand Barbie's accessories until the 1980s, and this was a significant difference between the dolls. During the 1970s, Pedigree focused on developing more Sindy products and neglected advertising and market research, risking
Mitzi Waltz Mitzi Waltz Mitzi Waltz is an associate lecturer in autism studies at the Autism Centre of Sheffield Hallam University in the United Kingdom. She is known for research in disability studies and is the author of "Autism: A Social and Medical History" (Palgrave Macmillan, 2013). Before her 2012 appointment to the Autism Centre, she was a lecturer in Autism Studies at the Autism Centre for Education and Research (ACER), University of Birmingham and a senior lecturer in Media and Cultural Studies at the University of Sunderland. Waltz has contributed to autism research and resources, including the Department of Children Schools