growth period (in children)
growing child's hearty appetite
prime of one's working life
flowers in full bloom; time of year in which flowers are in full bloom; the age at which someone (esp. a woman) is at the peak of their beauty; booming or peaking (in popularity)
young and cheeky; brash; sassy
growth period; period of rapid growth
playful age; heyday of youth
bloom of youth; prime of girlhood
best time for (corn, etc.); season (for fruit, etc.)
(at the) peak of mischievousness; little demon (of children)
the age of wisdom; around forty
youthful vigor; youthful vigour
woman's most sexually attractive age
the prime of one's career
period when a child is the most lovable