Final answer:
Lindsey, in the fantasy period of vocational development, is likely in her early childhood through to about 11 years old, where children dream about various occupations.
Step-by-step explanation:
The question refers to Lindsey being in the fantasy period of vocational development. This period generally corresponds to the era when children are allowed to dream and imagine jobs that are often based on their interests and hobbies, without a realistic understanding of what those jobs entail or require. Given the context, Lindsey is probably in the age range commonly associated with early childhood through to about 11 years old. The fantasy stage is characterized by high levels of optimism and a sense of adventure about the future.