* Father: Likely in his mid-30s to early 40s, as he is the head of the family and has a strong sense of leadership and resourcefulness.
* Mother: Likely in her late 20s to mid-30s, as she is described as being both nurturing and capable.
* Fritz: The eldest son, most likely in his late teens to early twenties, based on his maturity and skills.
* Ernest: The second son, likely in his mid-to-late teens, as he is depicted as being more adventurous and less responsible than Fritz.
* Jack: The youngest son, likely in his early teens, as he is described as being playful and curious.
* Franz: The family dog, not mentioned as having a specific age, but likely young and energetic.
It's important to remember that these are just estimations based on the characters' roles and descriptions. The actual ages of the characters could be different depending on your interpretation.