Though Robert was more reserved, he enjoyed the sparkle that Clara’s vivacious personality brought to the situations they experienced.
The speaker thinks (feels) that her daughter is growing up very fast and uncontrollably, so the speaker feels a wistful feeling towards past years in which her daughter was young and just learning to ride a bike, and the speaker wishes her daughter to remain forever in her chidlike state and never grow up.
Age seven or eight years old
