What gift does the water from the spring give?

The gift that the water from the spring gives is the gift of everlasting life. However, readers must decide if immortality is a gift or a curse. Throughout the story, the author introduces members of the Tuck family, who happened upon the spring 87 years prior. Each member of the family experienced fatal accidents, yet survived. Eventually, they discovered that the source of their immortality was the spring in which they drank from many years ago.
Though the youngest son, Jesse, makes the most out of his situation, the rest of the Tuck family view their eternal life as a curse. Because of this, the family strives to keep the spring a secret. Unfortunately, a stranger in a yellow suit becomes aware of the magical water. He is desperate to find the Tuck family and the spring in order to make a profit.
To make matters worse, the immortal family kidnaps a young girl who witnessed Jesse drinking from the spring. They have no choice but to tell her their secret. It then becomes a matter of convincing the girl (Winnie) that immortality is not a gift at all.

Tuck s spring water flows and it gives the ‘gift’ of immortality. But is that ’gift’ really a blessing or a curse? To answer that question one must really decide if living forever, while truly amazing, is really a double edged sword as Winnie comes to realize.
In answering that question of if being immortal is a blessing or a curse, look into the main characters of the story of Tuck Everlasting itself. Jesse s character is young and inexperienced being only seventeen when he drinks from the spring. At first thought, you might think it be a grand thing to always be young, lively, handsome and virile. But, now take a deeper ponder. Jesse never grows up, never blossoms into the whole of a person that can only come from the propelling of life experience. In his eternal youth, human growth eludes him and depths of life experience evade him. We might possibly look to Jesse s father, Angus, for an honest look at the ‘gift‘ of immortality. Angus understands and conveys sadly yet honestly that true joy in life and experience lie in not only the fleeting time we have on earth but also sees the beauty of its fragility. The knowing of all things including one s own life ending is what gives the joy the precious fragility and to Angus with his eternal ‘gift’ there simply is never an end.

The water from the Tucks' spring gives the gift of immortality, of everlasting life. To most people, this sounds amazing. Just imagine all the wonderful things you could do, all the places you could go, safe in the knowledge that, whatever happens, you're never going to die. But in reality, immortality is a mixed blessing to the Tucks, as Winnie discovers.
Jesse, for example, had never experienced much of life before drinking from the spring, and so he'll remain as a seventeen year old for the rest of eternity. This means that he'll never get to grow as a person, either physically or emotionally. And Angus, Jesse's father, is pretty bored of the whole immortality thing. He illustrates the old adage that all joys are mortal; that we can only truly enjoy life in the knowledge that one day it will all end. For Angus, however, each day is just the same old same old, and with literally no end in sight, we can see why immortality is as much a curse as a gift.