Final answer:
The question appears to be a typographical error and does not relate to the provided context about children's language development. At around 5 years old, a child typically has a vocabulary of at least 1,500 words and can define words by function. By age 3, they can have up to 1,000 words and can speak in sentences.
Step-by-step explanation:
The question 'How many mazes are in the average child's 100 word sample?' seems to be a typographical error. Instead, the question likely revolves around the vocabulary and language development in children, specifically the number of words they use on average within a certain age group. The query does not directly correlate with any information about mazes. Therefore, there doesn't seem to be a relevant answer to the question as asked.
From the provided reference material, it is clear that as children grow older, their vocabulary and language abilities rapidly expand. As children reach the age of 5 years old, they generally have a vocabulary of at least 1,500 words, can produce sentences of at least five to seven words, and are capable of defining words by function. By the age of 3 years, a child's vocabulary can include up to 1,000 words, and they can speak in full sentences. Thus, as it pertains to language development, children in middle childhood are able to interact using a rich and diverse vocabulary.