Text: they can enjoy riding through the house and garden or on the sidewalk for hours, while simultaneously improving their sense of balance and motor skills.

Correct capitalization: They can enjoy riding through the house and garden or on the sidewalk for hours, while simultaneously improving their sense of balance and motor skills.

Text: i tried to download a package listed in one of the security advisories, but i got a 'file not found' error.

Correct capitalization: I tried to download a package listed in one of the security advisories, but I got a 'file not found' error.

Text: over the course of this correspondence, bachmann reveals great personal development, yet astonishingly she still expresses the desire to be the person 'she has become'.

Correct capitalization: Over the course of this correspondence, Bachmann reveals great personal development, yet astonishingly she still expresses the desire to be the person 'she has become'.

Text: following the kiel week bustle it went on the cozy summer trip to norway.

Correct capitalization:
Following the Kiel Week bustle it went on the cozy summer trip to Norway.