Based on developmental milestones, what age would you estimate a child who can run, make a tower of 2 blocks, and has a vocabulary of 6 words?

A child who can run, make a tower of 2 blocks, and has a vocabulary of 6 words would typically be around 18 months of age. By this age, children usually show significant progress in motor skills and language development.

Running is a gross motor milestone that usually develops between 15 to 18 months, with many children mastering it closer to the end of that range. The ability to stack two blocks demonstrates fine motor skills and problem-solving abilities that are also expected at around 18 months.

In terms of vocabulary, children at this age are often beginning to combine words and might have a vocabulary of about 10 to 25 words, so having six words is in line with expectations for 18-month-olds, although it's on the lower end.

Children younger than 18 months typically have not yet developed the coordination and vocabulary skills as described in the question, making 18 months the most accurate estimate for the developmental milestones presented.